Bio-biodegradable Wastes

(i) Those waste materials which can be broken down to non-poisonous substances in nature by the action of microorganisms (like bacteria) are called biodegradable wastes.

(ii) They get recycled and therefore do not require dumping sites.

(iii) They do not cause any pollution to the soil.

Example: Paper, Wood, etc.

Non-Biodegradable Wastes

(i) Those waste materials which cannot be broken down to non-poisonous substances in nature are called non-bio-biodegradable wastes.

(ii) They cannot be recycled easily and therefore are to be dumped which requires lot of space. This cause wastage of land.

(iii) The harmful chemical leach out of these wastes when they are dumped in soil. This leads to soil pollution.

Example: DDT, Plastic and Polythene bags