Name the reaction responsible for large energy production in the sun.

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?

"Electricity generated by the water stored in a dam can be considered to be another form of solar energy." Explain by describing the series of energy transformations in sequence taking place during the process.

Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.

Why can wind energy farms be established only at specific locations? Give reasons to support your answer.