Question

give any two ways in which biodegradable substances would affect the environment

Answer 1

Biodegradable substances can affect the environment in the following ways
i. The biodegradable substances such as tree leaves, plant parts, and kitchen wastes can be used as fertilizers. 
ii.  The biodegradable substances mainly contain carbon. These substances after decomposition release that carbon back into the atmosphere.

Answer 2

1)they contaminate the soil and water resources as they cannot be decomposed by microorganisms.
2) the substances when eaten by stray animals could harm them.
3) they will serve as breeding ground for flies and mosquitoes which are carriers of cholera,malaria.
4) they release foul smell,which causes the air pollution.