Ans. (i) The non-biodegradable substances get accumulated and doesn Viit get decomposed hence it remains in the ecosystem and causes pollution, chokes the system of many animals and kill them. (ii) These substances due to accumulation cause water and soil pollution e.g., pesticides, detergents, polythene.

Hope it's helpful for you...

Explanation:

Non biodegradable substances would affect the environment because-;

• They contaminate soil and water resources as they cannot be decomposed by micro-organisms.
• These substances, when accidentally eaten by stray animals, can harm them and can even cause their death.