There are other options for using the sun's energy. We can grow trees to burn, we can optimise windows and window coverings to use solar energy to heat and cool

There are other options for using the sun's energy. We can grow trees to burn, we can optimise windows and window coverings to use solar energy to heat and cool buildings, we can put solar panels in the dessert, or in the ocean, or above roads or in space (but that's not very cost effective). My go to book on energy is this one http://www.withouthotair.com/ http://www.withouthotair.com/ It gives good numbers for all the energy that we could generate from renewables and all the energy we currently use.