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Biodegradable wastes |
Non-biodegradable wastes |
i. |
These are wastes which can be broken down to harmless or non-poisonous substances by the action of microorganisms. |
These are wastes which cannot be broken down to harmless or nonpoisonous substances by the action of micro-organisms. |
ii. |
These wastes undergo rotting. |
These wastes do not undergo rotting or take a very long time for rotting. |
iii. |
Example: domestic sewage, newspapers and vegetable matter. |
Example: polythene bags, plastics, glass, aluminium cans, iron nails and DDT. |