State whether the following statement is true or false:
Black surfaces are poor absorbers of heat.

Minimum velocity of wind required for a functional windmill is about:

Biomass has been used as fuel since ancient times. How has it been modified to function as a more efficient fuel in the recent past?

What are the limitations in obtaining energy from wind?

$A$ group of farmers teamed together to set-up a biogas plant close to their farms. List any six advantages that they would be able to derive from the plant.

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?