The energy output of a 1 KW solar energy unit is roughly equivalent to the burning of 170 pounds of coal and 300 pounds of carbon dioxide being released into the atmosphere. 

The sun is 109 times bigger than the Earth. The sun’s radius being 696,000km and the Earth’s radius 6, 376km.The sun is about 150 million km from the Earth and is aged about 4.5 billion years.

The average received solar power on land is lower still. In North America for example the average power of the solar radiation is roughly between 125 and 375 W/m², that is between 3 and 9 kWh per m² per day.

Africa’s Sahara desert, assuming 15% efficient solar cells, could generate more than 450 tarawatt (TW) per year. Current annual global energy consumption, including fossil and renewable sources is about 13 TW.