Plastics, like most commonly used polythene bags, not easy to be disposed off. They can remain undecomposed for hundreds of years in produces poisonous fumes. When eaten by animals, poly ags, cause serious choke in their intestines. Thus, it is necessary that we look for the materials that can replace plastics and are biodegradable. environment. On burning they e A biodegradable materials are the materials that can be decomposed by microorganisms like bacteria, e.g. vegetable paper, wood, cotton clothes etc. While such materials cannot be decomposed by microorganisms are called non-biodegradable, e.g. plastics, non-metals etc. e Now a days new kind of polymers are being developed which can naturally be decomposed, hence are called biodegradable polymers, eg. nylon-2,6, poly (3-hydroxy butyrate-CO-3-hydroxyvalerate) (PHBV) etc. These polymers are no longer an environmental concer

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