It’s about utilizing solar energy

·  The sun. Our star. The most reliable and abundant source of energy producing
400 000 000 000 000 000 000 000 000 watts of energy every second. 

·  In 2012 global energy consumption was approximately 15 000 000 000 000 000 watts.

·  In other words; every hour the sun beams onto Earth more than enough energy to satisfy global energy needs for an entire year.