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materials re-used to make new products, lesser quality (rubber tires to carpet)
items re-cycled to make the same product (pop cans to pop cans)
a process that allows the organic material in solid waste to be decomposed and reintroduced into the soil, often as fertilizer.
a place to deposit solid waste, where a layer of earth is bulldozed over garbage each day to reduce emissions of gases and odors from the decaying trash, to minimize fires, and to discourage vermin
the liquid that percolates to the bottom of a landfill
when the energy released from waste incineration is used to generate electricity
can consist of hazardous waste, industrial solid waste, or municipal waste. Many types of solid waste provide a threat to human health and the environment
a recycling system in which a product made from one type of material is recycled into a different type of product (e.g., used newspapers into toilet paper)
when materials, such as plastic or aluminum, are used to rebuild the same product; an example of this is the use of the aluminum from aluminum cans to produce more aluminum cans