The Ultimate Renewable: 
Energy reaching the earth is incredible.  By one calculation, 30 days of sunshine striking the Earth have the energy equivalent of the total of all the planet's fossil fuels, both used and unused.

The surface receives about 47% of the total solar energy that reaches the Earth.  Only this amount is usable.

Solar energy observation_(Image source)

The earth receives more energy from the sun in just one hour than the world uses in a whole year.

World solar energy map_(Image source)