The good thing about solar is it need not occupy new land. It can be installed on land already "occupied" by buildings.
According to NREL, there's enough existing roof space for 1,432 terawatt-hours of annual energy generation from solar, which would be 38.6% of our annual generation.
According to NREL, there's enough existing roof space for 1,432 terawatt-hours of annual energy generation from solar, which would be 38.6% of our annual generation.
https://www.nrel.gov/docs/fy16osti/65298.pdf