For most countries around the world, sourcing energy entirely from wind, solar, geothermal, and hydropower by 2050 would reduce their energy needs and costs, improve air quality, and help slow climate change, according to a study in Environmental Science & Technology.
The only reasons to not switch are political: the threatened power of the fossil capitalists and the geopolitical struggle with China.
there are some applications that just don’t work without energy dense fuels: planes, rockets, etc
in these cases, i’d argue it makes sense to run them on fossil or bio fuels and then pay to offset 100% of their emission with carbon capture, or in the case of bio fuels perhaps that’s enough since the carbon was captured and you’re just re-emitting it?
either way, emitting carbon isn’t the problem: not cleaning up after yourself is the problem… if it’s more economical to burn fuel and clean up elsewhere, fine… as long as it gets cleaned up