The following are the points that compare fossil fuels and the Sun:

a) The sun is a renewable source of energy but, fossil fuels are a non-renewable sources of energy.

b) The Sun’s energy does not cause any pollution but burning of fossil fuels causes a lot of pollution.

c) The Sun’s energy is available in a diffused from (scattered form) but fossils provide energy in concentrated form.

d) A solar cell or solar cooker is always needed to utilize sun’s energy but this is not so in the case of fossil fuels.

e) The Sun’s energy available only during the day time when the sun shines but energy of fossil fuels can be used all time.