Which of the following is used as a source of biodiesel in India?

Energy plantations differ from energy cropping in that they are primarily a:

Which of the following plant groups contributed significantly to the formation of coal?

Biogas produced by anaerobic fermentation of water biomass consists of

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?

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