Biodegradable substances affect the environment in the following ways:
(i) The biodegradable substances such as tree leaves, plant parts, and kitchen wastes can be used as humus after composting. This will enhance the soil fertility.
(ii) The biodegradable substances mainly contain carbon. These substances after decomposition release that carbon back into the atmosphere
Non-biodegradable substances affect the environment in the following ways:
(i) They contaminate soil and water resources as they cannot be decomposed by micro-organisms.
(ii) These substances, when accidentally eaten by stray animals, can harm them and can even cause their death.