I have a bunch of renewable energy calculations here: https://nextjournal.com/erik-engheim/renewable-energy-calculations https://nextjournal.com/erik-engheim/r

I have a bunch of renewable energy calculations here: https://nextjournal.com/erik-engheim/renewable-energy-calculations https://nextjournal.com/erik-engheim/renewable-energy-calcul... They show that you need roughly 25 m2 to cover energy use of a family. That easily fits on most roofs. A regular apartment is at least 80 m2, so you only use a fraction of the roof space. That means regular roof could in principle cover a 3 story apartment building with all the needed power. Of course industry and business also use power. But if every house had 50 m2 solar panels on the roof on average you would cover that as well. Thus roofs are in principle more than enough for most countries. Sure this will not always work, but it actually works quite well to combine solar power and agriculture: Agrovoltics. It can actually improve yields and give extra income to farmer which can sell electricity. These kinds of things is not taken into consideration when comparing land usage of nuclear power and solar power. Solar power can be mixed with residential areas and farms. Nuclear power can't. You are not going to place a fusion power plant on people's roofs.