Mention two disadvantages of using animal dung directly as a fuel.

Which is the ultimate source of energy?

Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?

What are the fuels used in atomic power plants called?

What is tidal energy?

Vinod is a member of the school Eco-club. He knows about a school that is a zero-garbage zone. He expressed his willingness to his teachers to implement the same in his school. He decided to place different coloured dustbins for segregating biodegradable and non-biodegradable garbage as the first step. Now answer the following questions.
$(a)$ Why does Vinod want to segregate biodegradable and non-biodegradable waste?
$(b)$ What can Vinod do with the biodegradable waste?