Recycling is the practice of recovering used materials from the waste stream
and then incorporating those same materials into the manufacturing process.
Many communities in California now offer curbside collection or drop-off
sites for certain recyclable materials. But collecting materials is only the
first step toward making the recycling process work.
Successful recycling also depends on manufacturers making products from
recovered materials and, in turn, consumers purchasing products made of recycled
materials. Do your part--"close the loop" and buy products made of recycled
materials whenever possible.
Where to Recycle
- Construction debris. You can search for facilities by
county that reuse or recycle types of
construction and demolition (C&D) debris, such as asphalt, drywall, and
metal, on our site.
- Plastic. You can also find facilities that reuse or
recycle
specific types of plastic, such as acrylic, nylon, high density
polyethylene (HDPE), and low density polyethylene (LDPE) on our site.
- Electronic Waste. Discarded
electronic products can present environmental hazards if not properly
managed. Find an organization
near you that may handle anything from televisions and monitors to cell
phones and CPUs. To find out more about California's electronic waste
recycling law and what it means to you, please visit eRecycle.org.
- The Waste
Prevention Information Exchange recycling page includes a
comprehensive list of recycling databases.
- Find
Your Nearest Recycling Center. Enter your ZIP code to go to the
"Earth's 911" website and find local centers for recycling materials,
including household hazardous waste.
Recycling for Schools and State Agencies
- School
Waste Reduction and Recycling. Schools can help communities
reduce their waste, while saving money and teaching kids valuable lessons.
- Project
Recycle. Recycling programs for State agencies.
- Beverage Containers. Beverage container recycling is
managed by the Department
of Conservation, Division of Recycling.
- Food Waste.
Food scraps can be turned into valuable soil amendments through the simple
techniques of composting or feeding a worm box.
- Recycling Tools. Helpful tools listed on this page include
lists of manufacturers of
containers
for home and office and of
recycling
processing equipment.
- Tire Recycling.
Californians use a lot of tires, which can be recycled in California to
produce crumb rubber for new products, recycled in rubberized asphalt
concrete (RAC), used in civil engineering applications, or combusted as
fuel.
- Used Oil Recycling.
Oil doesn't wear out, it just gets dirty! Find out more...
- Recycling
Coordinator Information and Resources. Materials and assistance
to help you set up and operate a successful waste reduction program in your
business, office, or locality.
Recycling involves processing used materials into new products in
order to prevent waste of potentially useful materials, reduce the consumption
of fresh raw materials, reduce energy usage, reduce air pollution (from incineration) and
water pollution (from landfilling) by reducing the need for
"conventional" waste disposal, and lower greenhouse gas emissions as compared
to virgin production.
Recycling is a key component of modern waste management and is the third
component of the "Reduce, Reuse, Recycle" waste hierarchy.
Recyclable materials include many kinds of glass, paper, metal, plastic, textiles, and electronics. Although similar in effect,
the composting or
other reuse of biodegradable waste – such as food or garden waste – is not
typically considered recycling.
Materials to be recycled are either brought to a collection center or picked up
from the curbside, then sorted, cleaned, and reprocessed into new materials
bound for manufacturing.
In a strict sense, recycling of a material would produce a fresh supply of
the same material, for example used office paper to more office paper, or used foamed polystyrene to
more polystyrene. However, this is often difficult or too expensive (compared
with producing the same product from raw materials or other sources), so
"recycling" of many products or materials involves their reuse in producing different materials
(e.g., cardboard)
instead. Another form of recycling is the salvage of certain materials from complex
products, either due to their intrinsic value (e.g., lead from car batteries, or gold from computer components), or due to their
hazardous nature (e.g., removal and reuse of mercury from various items).
Critics dispute the net economic and environmental benefits of recycling over
its costs. Specifically, critics argue that the costs and energy used in
collection and transportation detract from (and possibly outweigh) the costs and
energy saved in the production process; also that the jobs produced by the
recycling industry can be a poor trade for the jobs lost in logging, mining, and
other industries associated with virgin production; and that materials such as
paper pulp can only be recycled a few times before material degradation prevents
further recycling. Proponents of recycling counter each of these claims, and the
validity of arguments from both sides has led to enduring controversy.
Cost-benefit analysis
+ Environmental effects of recycling |
Material |
Energy Savings |
Air Pollution Savings |
Aluminium |
95% |
95% |
Cardboard |
24% |
— |
Glass |
5-30% |
20% |
Paper |
40% |
73% |
Plastics |
70% |
— |
Steel |
60% |
— |
There is some debate over whether recycling is economically efficient. Municipalities often
see fiscal benefits from
implementing recycling programs, largely due to the reduced landfill costs.
A study conducted by the Technical University of
Denmark found that in 83% of cases, recycling is the most efficient method
to dispose of household waste.
However, a 2004 assessment by the Danish Environmental Assessment Institute
concluded that incineration was the most effective method for disposing of drink
containers, even aluminum ones.
Fiscal efficiency is separate from economic efficiency. Economic analysis of
recycling includes what economists call externalities, which are unpriced costs
and benefits that accrue to individuals outside of private transactions.
Examples include: decreased air pollution and greenhouse gases from
incineration, reduced hazardous waste leaching from landfills, reduced energy
consumption, and reduced waste
and resource consumption,
which leads to a reduction in environmentally damaging mining and timber activity. Without mechanisms such as
taxes or subsidies to internalize externalities, businesses will ignore them
despite the costs imposed on society. In order to make such non-fiscal benefits
economically relevant, advocates have pushed for legislative action to increase the demand for recycled
materials.
The United
States Environmental Protection Agency (EPA) has concluded in favor of
recycling, saying that recycling efforts reduced the country's carbon emissions by a net 49 million
metric tonnes in 2005.
In the United Kingdom, the Waste and Resources
Action Programme stated that Great Britain's recycling efforts reduce
CO2 emissions by 10-15 million tonnes a year.
Recycling is more efficient in densely populated areas, as there are economies of scale involved.
Certain requirements must be met in order for recycling to be economically
feasible and environmentally effective. These include an adequate source of
recyclates, a system to extract those recyclates from the waste stream, a
nearby factory capable of
reprocessing the recyclates, and a potential demand for the recycled products.
These last two requirements are often overlooked—without both an industrial market for production using the
collected materials and a consumer market for the manufactured goods, recycling
is incomplete and in fact only "collection".
Many economists favor a moderate level of government intervention to provide
recycling services. Economists of this mindset probably view product disposal as
an externality of production and subsequently argue government is most capable
of alleviating such a dilemma. However, those of the laissez faire approach to
municipal recycling see product disposal as a service that consumers value. A
free-market approach is more likely to suit the preferences of consumers since
profit-seeking businesses have greater incentive to produce a quality product or
service than does government. Moreover, economists most always advise against
government intrusion in any market with little or no externalities.”
Trade in recyclates
Computers being collected for recycling at a pickup event in
Olympia, Washington, United
States.
Certain countries trade in unprocessed recyclates. Some have complained that
the ultimate fate of recyclates sold to another country is unknown and they may
end up in landfills instead of reprocessed. According to one report, in America,
50-80% of computers destined for recycling are actually not recycled.
There are reports of illegal-waste imports to China being dismantled and
recycled solely for monetary gain, without consideration for workers' health or
environmental damage. Though the Chinese government has banned these practices,
it has not been able to eradicate them.
Certain regions have difficulty using or exporting as much of a material as
they recycle. This problem is most prevalent with glass: both Britain and the
U.S. import large quantities of wine bottled in green glass. Though much of this
glass is sent to be recycled, outside the American
Midwest there is not enough wine production to use all of the reprocessed
material. The extra must be downcycled into building materials or re-inserted
into the regular waste stream.
Similarly, the northwestern United States
has difficulty finding markets for recycled newspaper, given the large number of
pulp mills in the
region as well as the proximity to Asian markets. In other areas of the U.S.,
however, demand for used newsprint has seen wide fluctuation.
In some U.S. states, a program called RecycleBank pays people with coupons to
recycle, receiving money from local municipalities for the reduction in landfill
space which must be purchased. It uses a single stream process in which all
material is automatically sorted.
Legislation
Supply
A recycling bin in Half Moon Bay,
California.
In order for a recycling program to work, having a large, stable supply of
recyclable material is crucial. Three legislative options have been used to
create such a supply: mandatory recycling collection, container deposit
legislation, and refuse bans. Mandatory collection laws set recycling
targets for cities to aim for, usually in the form that a certain percentage of
a material must be diverted from the city's waste stream by a target date. The
city is then responsible for working to meet this target.
Container deposit legislation involves offering a refund for the return of
certain containers, typically glass, plastic, and metal. When a product in such
a container is purchased, a small surcharge is added to the price. This
surcharge can be reclaimed by the consumer if the container is returned to a
collection point. These programs have been very successful, often resulting in
an 80% recycling rate. Despite such good results, the shift in collection costs
from local government to industry and consumers has created strong opposition to
the creation of such programs in some areas.
A third method of increase supply of recyclates is to ban the disposal of certain materials as
waste, often including used oil, old batteries, tires and garden waste. One aim
of this method is to create a viable economy for proper disposal of banned
products. Care must be taken that enough of these recycling services exist, or such bans
simply lead to increased illegal dumping.
Government-mandated demand
Legislation has also been used to increase and maintain a demand for recycled
materials. Four methods of such legislation exist: minimum recycled content
mandates, utilisation rates, procurement policies, recycled product
labelling.
Both minimum recycled content mandates and utilisation rates increase demand
directly by forcing manufacturers to include recycling in their operations.
Content mandates specify that a certain percentage of a new product must consist
of recycled material. Utilisation rates are a more flexible option: industries
are permitted to meet the recycling targets at any point of their operation or
even contract recycling out in exchange for tradeable credits. Opponents to both of these
methods point to the large increase in reporting requirements they impose, and
claim that they rob industry of necessary flexibility.
Governments have used their own purchasing
power to increase recycling demand through what are called "procurement
policies". These policies are either "set-asides", which earmark a certain
amount of spending solely towards recycled products, or "price preference"
programs which provide a larger budget when recycled items are
purchased. Additional regulations can target specific cases: in the United States,
for example, the Environmental
Protection Agency mandates the purchase of oil, paper, tires and building
insulation from recycled or re-refined sources whenever possible.
The final government regulation towards increased demand is recycled product
labeling. When producers are required to label their packaging with amount of
recycled material in the product (including the packaging), consumers are better
able to make educated choices. Consumers with sufficient buying power can
then choose more environmentally conscious options, prompt producers to increase
the amount of recycled material in their products, and indirectly increase
demand. Standardised recycling labelling can also have a positive effect on
supply of recyclates if the labelling includes information on how and where the
product can be recycled.
Process
Collection
Recycling and rubbish bin in a German railway
station.
A number of different systems have been implemented to collect recyclates
from the general waste stream. These systems tend to lie along the spectrum of
trade-off between public convenience and government ease and expense. The three
main categories of collection are "drop-off centres", "buy-back centres" and
"curbside collection".
Drop-off centres require the waste producer to carry the recyclates to a
central location, either an installed or mobile collection station or the
reprocessing plant itself. They are the easiest type of collection to establish,
but suffer from low and unpredictable throughput. Buy-back centres differ in
that the cleaned recyclates are purchased, thus providing a clear incentive for
use and creating a stable supply. The post-processed material can then be sold
on, hopefully creating a profit. Unfortunately government subsidies are
necessary to make buy-back centres a viable enterprise, as according to the
United States Nation Solid Wastes Management Association it costs on average
US$50 to process a ton of material, which can only be resold for US$30.
Curbside collection
Main article: Curbside collection
Curbside collection encompasses many subtly different systems, which differ
mostly on where in the process the recyclates are sorted and cleaned. The main
categories are mixed waste collection, commingled recyclables and source
separation.
A waste collection vehicle
generally picks up the waste.
A recycling truck collecting the contents of a recycling bin
in Canberra, Australia
At one end of the spectrum is mixed waste collection, in which all recyclates
are collected mixed in with the rest of the waste, and the desired material is
then sorted out and cleaned at a central sorting facility. This results in a
large amount of recyclable waste, paper especially, being too soiled to
reprocess, but has advantages as well: the city need not pay for a separate
collection of recyclates and no public education is needed. Any changes to which
materials are recyclable is easy to accommodate as all sorting happens in a
central location.
In a Commingled or single-stream system, all recyclables for collection are
mixed but kept separate from other waste. This greatly reduces the need for
post-collection cleaning but does require public education on what materials
are recyclable.
Source separation is the other extreme, where each material is cleaned and
sorted prior to collection. This method requires the least post-collection
sorting and produces the purest recyclates, but incurs additional operating costs
for collection of each separate material. An extensive public education program
is also required, which must be successful if recyclate contamination is to be
avoided.
Source separation used to be the preferred method due to the high sorting
costs incurred by commingled collection. Advances in sorting technology (see sorting below),
however, have lowered this overhead substantially—many areas which had developed
source separation programs have since switched to comingled collection.
Sorting
Once commingled recyclates are collected and delivered to a central collection
facility, the different types of materials must be sorted. This is done in a
series of stages, many of which involve automated processes such that a
truck-load of material can be fully sorted in less than an hour.
Some plants can now sort the materials automatically, known as Single Stream. A
30% increase in recycling rates has been seen in the areas where these plants
exist.
Initially, the commingled recyclates are removed from the collection vehicle
and placed on a conveyor belt spread out in a single layer. Large pieces of cardboard and plastic bags are
removed by hand at this stage, as they can cause later machinery to jam.
Next, automated machinery separates the recyclates by weight, splitting
lighter paper and plastic from heavier glass and metal. Cardboard is removed
from the mixed paper, and the most common types of plastic, PET (#1) and HDPE (#2), are
collected. This separation is usually done by hand, but has become automated in
some sorting centers: a spectroscopic scanner is used to
differentiate between different types of paper and plastic based on the absorbed
wavelengths, and subsequently divert each material into the proper collection
channel.
Strong magnets are used to separate out ferrous metals,
such as iron, steel, and tin-plated steel cans ("tin cans"). Non-ferrous metals are ejected by
magnetic eddy currents in
which a rotating magnetic field induces an electric current around the
aluminum cans, which in turn creates a magnetic eddy current inside the cans.
This magnetic eddy current is repulsed by a large magnetic field, and the cans
are ejected from the rest of the recyclate stream.
Finally, glass must be sorted by hand based on its color: brown, amber, green
or clear.
Common recyclables
Many different materials can be recycled but each type requires a different
technique.
Aggregates and concrete
Concrete blocks
Main article: Concrete
recycling
Concrete aggregate collected from
demolition sites is put through a crushing machine, often along with asphalt,
bricks, dirt, and rocks. Smaller pieces of concrete are used as gravel for new
construction projects. Crushed recycled concrete can also be used as the dry
aggregate for brand new concrete if it is free of contaminants. This reduces the
need for other rocks to be dug up, which in turn saves trees and habitats.
Batteries
Some batteries contain toxic heavy metals, making recycling
or proper disposal a high priority
Main article: Battery
recycling
The large variation in size and type of batteries makes their recycling
extremely difficult: they must first be sorted into similar kinds and each kind
requires an individual recycling process. Additionally, older batteries contain
mercury and cadmium, harmful materials which must be handled with care. Because
of their potential environmental damage, proper disposal of used batteries is
required by law in many areas. Unfortunately, this mandate has been difficult to
enforce.
Lead-acid batteries, like those used in automobiles, are
relatively easy to recycle and many regions have legislation requiring vendors
to accept used products. In the United States, the recycling rate is 90%, with
new batteries containing up to 80% recycled material.
Biodegradable waste
Garden waste for composting
Main article: Composting
Kitchen, garden, and other green waste can be recycled into useful
material by composting. This process allows natural aerobic bacteria to break down the
waste into fertile topsoil.
Much composting is done on a household scale, but municipal green-waste
collection programs also exist. These programs can supplement their funding by
selling the topsoil produced.
Clothing
Recycling clothes via consignment or swapping has become increasingly popular. In
a clothing
swap, a group of people gather at a venue to exchange clothes amongst each other. In
organizations like Clothing Swap, Inc., unclaimed clothing is donated to a local
charity.
Electronics disassembly and reclamation
An abandoned computer monitor
Main article: Computer
recycling
The direct disposal of electrical equipment—such as old computers and mobile phones—is banned in
many areas due to the toxic contents of certain components. The recycling
process works by mechanically separating the metals, plastics, and circuit boards contained in the
appliance. When this is done on a large scale at an electronic waste recycling
plant, component recovery can be achieved in a cost-effective manner.
Ferrous metals
Steel crushed and baled for recycling
Main article: Steel recycling
Iron and steel are the world's most recycled materials, and among the easiest
materials to reprocess, as they can be separated magnetically from the waste
stream. Recycling is via a steelworks: scrap is either remelted in an electric arc furnace
(90-100% scrap), or used as part of the charge in a Basic Oxygen Furnace
(around 25% scrap).
Any grade of steel can be recycled to top quality new metal, with no
'downgrading' from prime to lower quality materials as steel is recycled
repeatedly. 42% of crude steel produced is recycled material.
Non-ferrous metals
Main article: Aluminium
recycling
Aluminium is one of the most efficient and widely-recycled materials. Aluminium is shredded
and ground into small pieces or crushed into bales. These pieces or bales are
melted in an aluminium smelter to produce molten aluminium. By this stage the
recycled aluminium is indistinguishable from virgin aluminium and further
processing is identical for both. This process does not produce any change in
the metal, so aluminium can be recycled indefinitely.
Recycling aluminium saves 95% of the energy cost of processing new
aluminium.
This is because the temperature necessary for melting recycled, nearly pure,
aluminium is 600 °C, while to extract mined aluminium from its ore requires
900 °C. To reach this higher temperature, much more energy is needed,
leading to the high environmental benefits of aluminium recycling. Americans
throw away enough aluminum every year to rebuild their entire commercial air
fleet. Also, the energy saved by recycling one aluminum can is enough to run a
television for three hours.
Glass
Public glass waste collection point for
separating clear, green and amber glass
Main article: Glass
recycling
Glass bottles and jars are gathered by a curbside collection truck and bottle
banks, where the glass may be sorted into color categories. The collected glass
cullet is taken to a glass recycling plant where it is monitored for
purity and contaminants are removed. The cullet is crushed and added to a raw
material mix in a melting furnace. It is then mechanically blown or molded into
new jars or bottles. Glass cullet is also used in the construction industry for
aggregate and glassphalt. Glassphalt is a road-laying material which
comprises around 30% recycled glass. Glass can be recycled indefinitely as its
structure does not deteriorate when reprocessed.
Paper
Main article: Paper
recycling
Paper can be recycled by reducing it to pulp and combining it
with pulp from newly harvested wood. As the recycling process causes the paper
fibres to break down, each time paper is recycled its quality decreases. This
means that either a higher percentage of new fibres must be added, or the paper
downcycled into lower quality products. Any writing or colouration of the paper
must first be removed by deinking,
which also removes fillers, clays, and fibre fragments.
Almost all paper can be recycled today, but some types are harder to recycle
than others. Papers coated with plastic or aluminium foil, and papers that are
waxed, pasted, or gummed are usually not recycled because the process is too
expensive. Gift-wrap paper also cannot be recycled due to its already poor
quality.
Sometimes recyclers ask for the removal of the glossy inserts from newspapers
because they are a different type of paper. Glossy inserts have a heavy clay
coating that some paper mills cannot accept. Most of the clay is removed from
the recycled pulp as sludge which must be disposed of. If the coated paper is
20% by weight clay, then each ton of glossy paper produces more than 200 kg
of sludge and less than 800 kg of fibre.
Plastic
Plastic shipping crates
Main article: Plastic
recycling
Plastic recycling is the process of recovering scrap or waste plastics and
reprocessing the material into useful products. Compared to glass or metallic
materials, plastic poses unique challenges. Because of the massive number of
types of plastic, they each carry a resin identification code,
and must be sorted before they can be recycled. This can be costly; while metals
can be sorted using electromagnets, no such 'easy sorting' capability exists for
plastics. In addition to this, while labels do not need to be removed from
bottles for recycling, lids are often made from a different kind of
non-recyclable plastic.
To help in identifying the materials in various plastic items, resin
identification code numbers 1-6 have been assigned to six common kinds of
recyclable plastic resins, with the number 7 indicating any other kind of
plastic, whether recyclable or not. Standardized
symbols are available incorporating each of these resin codes.
Textiles
Main article: Textile
recycling
A brown cloth
When considering textile recycling one must understand what the material
consists of. Most textiles are composites of cotton (biodegradable material) and
synthetic plastics. The textile's composition will affect its durability and
method of recycling.
Workers sort
and separate collected textiles into good quality clothing and shoes which can
be reused or worn. There is a trend of moving these facilities from developed
countries to developing countries either for charity or sold at a cheaper
price.
Many international organisations collect used textiles from developed countries
as a donation to those third world countries. This recycling practise is
encouraged because it helps to reduce unwanted waste while providing clothing to
those in need.
Damaged textiles are further sorted into grades to make industrial wiping cloths
and for use in paper manufacture or material suitable for fibre reclamation and
filling products. If textile reprocessors receive wet or soiled clothes however,
these may still be disposed of in a landfill, as the washing and drying
facilities are not present at sorting units.
Fibre reclamation mills sort textiles according to fibre type and colour.
Colour sorting eliminates the need to re-dye the recycled textiles. The textiles
are shredded into "shoddy" fibres and blended with other selected fibres,
depending on the intended end use of the recycled yarn. The blended mixture is
carded to clean and mix the fibres and spun ready for weaving or knitting. The
fibres can also be compressed for mattress production. Textiles sent to the
flocking industry are shredded to make filling material for car insulation,
roofing felts, loudspeaker cones, panel linings and furniture padding.
Timber
A stack of wooden pallets awaits reuse or
recycling.
Main article: Timber
recycling
Recycling timber has become popular due to its image as an environmentally
friendly product, with consumers commonly believing that by purchasing recycled
wood the demand for green timber will fall and ultimately benefit the
environment. Greenpeace also view recycled timber as an environmentally friendly
product, citing it as the most preferable timber source on their website. The
arrival of recycled timber as a construction product has been important in both
raising industry and consumer awareness towards deforestation and promoting
timber mills to adopt more environmentally friendly practices.
Wood recycling is a subject which has in recent years taken an ever greater
role in our lives. The problem, however, is that although many local authorities
like the idea of recycling, they do not fully support it. One of the countless
examples, which has been in the news is the concept of actually recycling wood
which is growing in the cities. Namely, recycling timber, trees and other
sources.
Other techniques
Several other materials are also commonly recycled, frequently at an
industrial level.
Ship
breaking is one example that has associated environmental, health, and
safety risks for the area where the operation takes place; balancing all these
considerations is an environmental justice
problem.
Tire
recycling is also common. Used tires can be added to asphalt for producing road surfaces or to
make rubber
mulch used on playgrounds for safety. They are also often used as the
insulation and heat absorbing/releasing material in specially constructed homes
known as earthships.
Sustainable design
Main article: Sustainable
design
Much of the difficulty inherent in recycling comes from the fact that most
products are not designed with recycling in mind. The concept of sustainable
design aims to solve this problem, and was first laid out in the book "Cradle
to Cradle: Remaking the Way We Make Things" by architect William McDonough and chemist Michael Braungart. They
suggest that every product (and all packaging they require) should have a
complete "closed-loop" cycle mapped out for each component—a way in which every
component will either return to the natural ecosystem through biodegradation or
be recycled indefinitely.
As with environmental economics, care must be taken to ensure a complete view
of the costs and benefits involved. For example, cardboard packaging for food
products is more easily recycled than plastic, but is heavier to ship and may
result in more waste from spoilage.
History
Early recycling
Recycling has been a common practice for most of human history, with recorded
advocates as far back as Plato
in 400 BC. During periods when
resources were scarce, archaeological studies of ancient waste dumps show less
household waste (such as ash, broken tools and pottery)—implying more waste was
being recycled in the absence of new material.
In pre-industrial times, there is
evidence of scrap bronze and other metals being collected in Europe and melted
down for perpetual reuse.
In Britain dust and ash from wood and coal fires was collected by 'dustmen' and
downcycled as a base
material used in brick making. The main driver for these types of recycling was
the economic advantage of obtaining recycled feedstock instead of acquiring
virgin material, as well as a lack of public waste removal in ever more densely
populated areas.
In 1813, Benjamin
Law developed the process of turning rags into 'shoddy' and 'mungo' wool in
Batley, Yorkshire. This material combined recycled fibres with virgin wool. The
West Yorkshire shoddy industry in towns such as Batley and Dewsbury, lasted from
the early 19c to at least the First World War.
Publicity photo for US aluminium salvage campaign,
1942
Wartime recycling
Resource shortages caused by the world wars, and other such world-changing
occurrences greatly encouraged recycling
. Massive government promotion campaigns were carried out in World War II in
every country involved in the war, urging citizens to donate metals and conserve
fibre, as a matter of significant patriotic importance. Resource conservation
programs established during the war were continued in some countries without an
abundance of natural resources, such as Japan, after the war ended.
Post-war recycling
The next big investment in recycling occurred in the 1970s, due to rising
energy costs. Recycling aluminum uses only 5% of the energy required by virgin
production; glass, paper and metals have less dramatic but very significant
energy savings when recycled feedstock is used.
Woodbury, New Jersey was the
first city in the entire United States to mandate recycling.
Led by Rose Rowan
in the early 1970s, the idea of towing a "recycling" trailer behind a waste
management vehicle to enable the collection of trash and recyclable material at
the same time emerged. Other towns and cities soon followed suit, and today many
cities in the U.S. make recycling a requirement.
In 1987, the Mobro
4000 barge hauled garbage from New York to North Carolina; where it was denied.
It was then sent to Belize;
where it was denied as well. Finally, the barge returned to New York and the
garbage was incinerated. The incident led to heated discussions in the media
about waste disposal and recycling. The incident is often referred to as
igniting the recycling "hysteria" of the 1990s.
Criticism
Main article: Recycling criticism
In a 1996 article in The New York Times, John Tierney claimed that
government mandated recycling wastes more resources than it saves.
Some highlights from the article:
- In cases where recycling truly does save resources, such as with large
scraps of aluminum, this will be reflected in market prices, and voluntary
recycling will take place. Thus, there is no need for the government to
mandate it.
- Tree farmers plant more trees than they cut down.
- Government mandated recycling is more expensive than putting the garbage
into landfills.
- Some small towns with landfills are happy to import garbage from other
cities and states because it provides jobs and tax revenue.
- Today's modern landfills are much cleaner and safer, and much less likely
to leak and pollute than the landfills of the past.
- Incinerators make more energy than
recycling saves. Also, some things, such as glossy paper, can't be recycled,
and it is better to burn such materials for energy.
- Regarding the claim that the U.S. is running out of landfill space,
Tierney wrote, "A. Clark Wiseman, an economist at Gonzaga University in
Spokane, Washington, has calculated that if Americans keep generating garbage
at current rates for 1,000 years, and if all their garbage is put in a
landfill 100 yards (91 m) deep, by the year 3000 this national
garbage heap will fill a square piece of land 35 miles (56 km) on
each side. This doesn't seem a huge imposition in a country the size of
America. The garbage would occupy only 5 percent of the area needed for the
national array of solar panels proposed by environmentalists. The millennial
landfill would fit on one-tenth of 1 percent of the range land now available
for grazing in the continental United States. And if it still pains you to
think of depriving posterity of that 35-mile (56 km) square, remember
that the loss will be only temporary. Eventually, like previous landfills, the
mounds of trash will be covered with grass and become a minuscule addition to
the nation's 150,000 square miles (390,000 km2) of
parkland."
Tierney's article received a referenced critique from the Environmental Defense
Fund, which noted that "the article relied heavily on quotes and information
supplied by a group of consultants and think tanks that have strong ideological
objections to recycling".
In 2003, the city of Santa Clarita, California
was paying $28 per ton to put garbage into a landfill. The city then adopted a
mandatory diaper recycling program that cost $1,800 per ton.
In a 2007 article, Michael Munger, the Chair of Political Science at Duke
University, wrote, "... if recycling is more expensive than using new
materials, it can't possibly be efficient... There is a simple test for
determining whether something is a resource... or just garbage... If someone
will pay you for the item, it's a resource... But if you have to pay someone to
take the item away... then the item is garbage."
In a 2002 article for The Heartland Institute, Jerry Taylor, director of natural
resource studies at the Cato Institute, wrote, "If it costs X
to deliver newly manufactured plastic to the market, for example, but it costs
10X to deliver reused plastic to the market, we can conclude the resources
required to recycle plastic are 10 times more scarce than the resources required
to make plastic from scratch. And because recycling is supposed to be about the
conservation of resources, mandating recycling under those circumstances will do
more harm than good."
In 2002, WNYC reported that 40% of
the garbage that New York City residents separated for recycling actually ended
up in landfills.