Eco-balance of a Solar Electricity Transmission from North Africa to Europe

 

In other words, an area of 254 km x 254 km would be enough to meet the total
electricity demand of the world.  

 

https://www.dlr.de/tt/Portaldata/41/Resources/dokumente/institut/system/projects/Ecobalance_of_a_Solar_Electricity_Transmission.pdf