Comment by leonidasrup

You can look at coal, oil, gas as form of compressed solar energy, because all of them have biological source, stored millions of year ago. It's just burning coal, oil, gas has nasty side effects.

" Volcanic coal-burning in Siberia led to climate change 252 million years ago.

Extensive burning in Siberia was a cause of the Permo-Triassic extinction " https://www.nsf.gov/news/volcanic-coal-burning-siberia-led-c...