Which one of the following is a renewable source of energy?

The sap of which plant is considered a good substitute for diesel oil?

$A$ non-polluting source of energy is

Which type of wood burns for a short period of time?

What is Gasohol?

Observe the figures $A$ and $B$ given below and answer the following questions.
$(i)$ The power generation by the above two methods is non-polluting. True/False.
$(ii)$ List any two applications of solar energy.
$(iii)$ What is a photovoltaic cell?