Question

why are some substance biodegradable and some non biodegradable

Answer 1

The substances which can be broken down into simpler substances by the action of bacteria are called biodegradable substances. For example peels of vegetables, animal faeces etc.
Whereas
The substances which can not be broken down into simpler substances by the action of bacteria are called non biodegradable substances.for example plastic etc.
Thus some substances are biodegradable and some non biodegradable.


Hope it helps

Answer 2

♤ Substances which are organic are biodegradable.Exmaple :- Agricultural waste

♤ Substances which are inorganic are non bio degradable. Example :- Polythene bags

♤ Decomposers can utilise organic substances as their food while other substances cannot be utilised by Decomposers as food .

♤ Due to this reasons some substances are biodegradable while other are non bio degradable.