CBSE Class 10 Science 2017 · Paper 31/1/C · Question 2
Why should biodegradable and non-biodegradable wastes be discarded in two different dustbins ?
Answer
They are disposed of differently: biodegradable waste can be composted, while non-biodegradable waste needs recycling or separate disposal.
Because the two kinds of waste are disposed of in different ways. Biodegradable waste (peels, leftover food, dry leaves) is broken down by decomposers, so it can be turned into compost (manure) or used in a biogas plant. Non-biodegradable waste (polythene, plastics, glass, metal) is not broken down by decomposers, so it has to be recycled, reused or disposed of separately. Collecting them in separate dustbins lets each kind go straight to its own treatment; mixed together, neither can be composted or recycled easily, and non-biodegradable waste left in the environment can harm it.
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