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

Explanation

(i) Decomposition process of biodegradable materials produces foul smell and some harmful substances, which makes the environment nasty and unhealthy for people living in nearby areas.
(ii) Decomposition process in sewage water and open biodegradable waste provides breeding ground for mosquitoes, insects and microbes resulting into a number of diseases like malaria, cholera, diarrhoea, etc.