Question

Why sun is said to be the mainsource of energy ?

Answer 1

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Solar radiation is the fundamental energy driving our climate system, and nearly all climatic and biologic processes on Earth are dependent on solar input. Energy from the sun is essential for many processes on Earth including warming of the surface, evaporation, photosynthesis and atmospheric circulation.

Answer 2

Answer:

and now a day sun is not a main source of energy but in upcoming future it will be and its should be main source of energy because it don't lead toh any pollution or damage to our environment and sunlight is present all day in a large bulk all over the world