Of Interest: "Solar radiation along with secondary solar resources such as wind and wave power, hydroelectricity and biomass, account for over 99.9% of the available flow of renewable energy on Earth.[8][9] The flows and stores of solar energy in the environment are vast in comparison to human energy needs.

    * The total solar energy absorbed by Earth's atmosphere, oceans, and land masses is approximately 3850 zettajoules (ZJ) per year.
    * Wind energy potential is estimated at 2.25 ZJ per year.
    * Photosynthesis captures approximately 3 ZJ per year in biomass.
    * Worldwide electricity consumption was approximately 0.0567 ZJ in 2005.
    * Worldwide energy consumption was 0.487 ZJ in 2005."  (Source: Wikipedia.org)