How much solar energy does it take to power the world? The dark discs represent the and mass needed using current
technology to accomplish that goal. Is this accrate? If so, why on earth aren't we pursuing this with a vengeance.

Sunlight hitting the dark discs could power the whole world:  If installed in areas marked by the six discs in the map, solar cells with a conversion efficiency of only 8 % would produce, on average, 18 TW electrical power.  That is more than the total power currently available from all our primary energy sources, including coal, oil, gas, nuclear, and hydro.  The colors show a three-year average of solar irradiance, including nights and cloud coverage. Matthhias Loster