Differentiate between biodegradable and non-biodegradable substances with the help of one example each. List two changes in habit that people must adopt to dispose non-biodegradable waste, for saving the environment.

Biodegradable substances: These are the substance which can be broken down into simpler substances by nature / decomposers/bacteria/saprophytes/saprobionts.
Example: Human excreta, vegetable peels, etc.
Non-biodegradable substances: These are the substance which cannot be broken down into simpler substances by nature/decomposers.
Example: Plastic, glass (or any other).
Habits to be adopted:
– Use of separate dustbins for biodegradable and non-biodegradable waste.
– Reuse of things, such as poly bags, glass bottles, etc. again and again.
– Avoid use of plastic/polythene for packing.
– Use of cotton/jute bags for carrying vegetables, etc.