Answer 1

Degradable Pollutants	Non – degradable Pollutants
They are decomposed and degradable by microbes.	They cannot be decomposed by microbes
They are not accumulated but are used up in short time.	They are often accumulated
Degradation process is rapid	Degradation process is slow.
They are used to produce energy manures compost and biogas.	They cannot be used to produce energy
E.g. Plant waste, Animal residue, Paper, rotten vegetables	E.g. Plastic items footwear, polythene bags