Recycling
In the fourth century BC, Plato wrote about reusing materials when resources were scarce. Archaeological studies of ancient waste dumps show less household ash and broken pottery from those times. This implies that people recycled more than they discarded new items. In 1031, Japanese shops began selling repulped paper to customers. A British town called Batley in Yorkshire saw Benjamin Law develop a process for turning rags into shoddy wool by 1813. The West Yorkshire shoddy industry operated in towns like Dewsbury until at least 1914. Railroads purchased scrap metal during the 19th century while steel industries bought it in the early 20th century. By World War I, thousands of peddlers roamed American city streets collecting discarded machinery and pots. Manufacturers of beverage bottles offered refundable deposits around 1800 in Great Britain and Ireland. An official recycling system with refunds started in Sweden in 1884 for glass bottles. That Swedish program achieved recycling rates between 84% and 99% depending on bottle type. Glass bottles could be refilled approximately 20 times before becoming unusable.
During World War II, financial constraints forced governments to reuse goods and recycle materials. Massive government campaigns emerged across fighting nations urging citizens to donate metal, paper, rags, and rubber as patriotic duty. The National Salvage Campaign operated in Britain while the Salvage for Victory campaign ran in the United States. These resource shortages caused by world wars encouraged recycling practices globally. In 1970, rising energy costs triggered considerable investment in recycling programs. Recycling aluminum uses only 5% of the energy required for virgin production. Glass, paper, and other metals show significant but less dramatic energy savings when recycled. Consumer electronics became popular since the 1920s yet recycling them remained almost unheard of until early 1991. Switzerland implemented the first electronic waste recycling scheme starting with old refrigerators. When these programs were created, many countries exported hazardous e-waste to developing nations without environmental legislation. Recycling computer monitors in the United States cost 10 times more than in China. Demand for electronic waste grew rapidly in Asia during the 2000s as scrapyards extracted valuable substances like copper, silver, iron, silicon, nickel, and gold. By 2002, e-waste grew faster than any other type of waste in the European Union.
The World Health Organization reported in 2023 that millions of electrical devices are discarded annually creating threats to human health if not treated properly. Common items include computers and home automation products which become obsolete at high rates. When e-waste is treated using inferior activities it can release up to 1000 different chemical substances including harmful neurotoxicants such as lead. Copper slag generates approximately 2.2 to 3 tons per ton of copper produced resulting in around 24.6 tons of slag yearly. Environmental impact includes copper paralysis leading to death from gastric hemorrhage if ingested by humans. Acute dermatitis may occur upon skin exposure while toxicity spreads through crops into food sources. This increases risks of cardiovascular diseases cancer cognitive impairment chronic anemia and damage to kidneys bones nervous system brain and skin. Substituting gravel and grit in quarries has proven more cost-effective due to better proximity to consumer markets. Trading between countries helps increase slag utilization reducing wastage and pollution. The Basel Convention formed after the cargo barge Khian Sea dumped 14,000 metric tons of toxic ash in Haiti to stem hazardous substance flows into poorer countries. The convention created the e-Stewards certification ensuring recyclers meet highest environmental standards.
Three legislative options exist to create stable supplies for recycling programs: mandatory collection container deposit legislation and refuse bans. Mandatory collection laws set targets requiring cities to divert a certain percentage of material from waste streams by target dates. Container deposit legislation mandates refunds for returning containers typically glass plastic and metal. When purchasing products in these containers consumers pay small surcharges reclaimable at collection points. These programs achieved average 80% recycling rates despite strong opposition where manufacturers bear responsibility. In the European Union the WEEE Directive requires producers to reimburse recyclers' costs. Bans on disposing materials like used oil old batteries tires and garden waste can create viable economies if services exist. Four forms of legislation increase demand including minimum recycled content mandates utilization rates procurement policies and labeling. Content mandates specify percentages of new products must consist of recycled material. Utilization rates allow industries to meet targets flexibly or contract out recycling for tradable credits. Governments use purchasing power through set-asides reserving spending for recycled products or price preference programs providing larger budgets. The Environmental Protection Agency mandates purchase of oil paper tires and insulation from recycled sources whenever possible. Standardized labeling specifies how and where products can be recycled helping consumers make educated choices.
According to Natural Resources Defense Council studies waste collection creates less than one job per 1,000 tons managed while processing recycled materials creates 6 to 13 jobs per 1,000 tons. Over 50,000 recycling establishments created over a million jobs in the United States. The National Waste & Recycling Association reported May 2015 that recycling made $6.7 billion economic impact in Ohio employing 14,000 people. Two years after New York City declared recycling would drain city funds leaders realized efficient systems could save over $20 million. Municipalities often see fiscal benefits largely due to reduced landfill costs. A study by Technical University of Denmark found recycling most efficient method disposing household waste in 83% cases. However a 2004 Danish assessment concluded incineration most effective for drink containers including aluminum ones. Free-market economist Julian Simon remarked society organizes disposal through commanding guiding by tax/subsidy or leaving it to individuals. Frank Ackerman favors high government intervention believing recycling benefit cannot be quantified by laissez-faire economics. Allen Hershkowitz supports intervention calling it public service equal to education and policing. Paul Calcott and Margaret Walls advocate deposit refund schemes with small refuse charges encouraging recycling without illegal dumping. Daniel K. Benjamin argues recycling wastes resources lowering population wealth noting US landfills heavily regulated making pollution negligible. Recycling can cost cities more than twice as much as landfills while generating its own pollution.
About two-thirds of recycling costs occur during the collection phase across drop-off centers buy-back centers and curbside collection. Mixed waste collection sorts desired materials at central facilities resulting in large amounts of paper too soiled to reprocess but requiring no public education. Commingled single-stream systems keep recyclables mixed yet separate from non-recyclable waste reducing post-collection cleaning needs. Source separation cleans each material before collection producing purest recyclates but incurring additional operating costs. Advances in sorting technology substantially lowered overhead causing many areas to switch from source separation to co-mingled collection. A 30% increase in recycling rates appeared in areas with automated sorting plants. Over 300 materials recovery facilities exist in the United States handling paper plastics glass metals food scraps and batteries. Automated machinery separates recyclables by weight splitting lighter paper and plastic from heavier glass and metal. Spectroscopic scanners differentiate between types of paper and plastic based on absorbed wavelengths. Strong magnets remove ferrous metals like iron steel and tin cans while eddy currents eject non-ferrous aluminum cans. Glass gets sorted by color brown amber green or clear either manually or via colored filter machines. San Francisco's Recology facility helped reach 80% landfill diversion rate as of 2021 achieving record-breaking results.
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Common questions
When did Plato write about reusing materials?
Plato wrote about reusing materials in the fourth century BC when resources were scarce. Archaeological studies of ancient waste dumps show less household ash and broken pottery from those times.
What year did Japan begin selling repulped paper to customers?
Japanese shops began selling repulped paper to customers in 1031. This early commercial recycling activity predates modern industrial processes by many centuries.
How much energy does recycling aluminum use compared to virgin production?
Recycling aluminum uses only 5% of the energy required for virgin production. Glass, paper, and other metals show significant but less dramatic energy savings when recycled.
Which country implemented the first electronic waste recycling scheme starting with old refrigerators?
Switzerland implemented the first electronic waste recycling scheme starting with old refrigerators. Consumer electronics became popular since the 1920s yet recycling them remained almost unheard of until early 1991.
What percentage of glass bottles could be refilled before becoming unusable?
Glass bottles could be refilled approximately 20 times before becoming unusable. An official recycling system with refunds started in Sweden in 1884 for glass bottles achieving rates between 84% and 99% depending on bottle type.
When did the Basel Convention form after the Khian Sea incident?
The Basel Convention formed after the cargo barge Khian Sea dumped 14,000 metric tons of toxic ash in Haiti to stem hazardous substance flows into poorer countries. The convention created the e-Stewards certification ensuring recyclers meet highest environmental standards.