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The Epic Interactive Encyclopedia 1996
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Epic Interactive Encyclopedia, The (1996)(Epic Marketing)[non-bootable].iso
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biodegradable
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1992-09-02
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21 lines
The term biodegradable is used for any item
capable of being broken down by living
organisms, principally bacteria and fungi.
In biodegradable substances, such as food and
sewage, the natural processes of decay lead
to compaction and liquefaction, and to the
release of nutrients that are then recycled
by the ecosystem. This process can have some
disadvantageous side effects, such as the
release of methane, an explosive greenhouse
gas. However, the technology now exists for
waste tips to collect methane in underground
pipes, drawing it off and using it as a cheap
source of energy. Nonbiodegradable
substances, such as glass, heavy metals, and
most types of plastic, present serious
problems, now and in the future of disposal
techniques.
Subject by: John Denver