Answer:
(a) Biodegradable substance: Can be broken down into simpler substances by nature e.g., Vegetable peels. (b) Non-biodegradable substances: Cannot be broken down into simpler substances by nature. e.g., Plastics or Glass. Changes in habit: (i) Use of separate dustbins for biodegradable and non-biodegradable waste. (ii) Reusing of things such as polybags. (iii) Recycle of waste. (iv) Use of carry bags.
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