3. What do we do to the useful components (biodegradable) of the garbage?

Ans: Generally, useful components of the garbage are used to make compost. Compost are usually developed near the landfill. (i) For preparing compost, waste materials like fruit and vegetable peel, egg shells, used tea leaves, waste food, dry leaves, newspapers etc. should be dumped in a pit. (ii) The pit is covered with soil. (iii) After 20-25 days, observe the garbage. If the garbage is rot, turned black in colour and no foul smell is emitted, it means rotting of garbage is complete and compost is ready to use.