A high level engineer friend in the energy field said to me once: there's no 100% clean energy.<br>You put a big enough scope of operation on any type of energy production matrix and it will generate some kind of pollution or environmental hazard.,(reply>), @Scrymgarr carbon that has been underground for millions of years. Vs carbon in trees that cycles every few decades to every few hundred years is two way different stories.      And most importantly.    Carbon im.the air isn't regrowing coal underground somewhere,(reply>), @Isaac Fulton coal is also already carbon, and that cycle slows when you have less trees making less trees to burn for power isnt going to help anything in that cycle.,(reply>), @Scrymgarr tress that were made from carbon already in the air.   And burning them just allows that cycle to continue so more trees can re absorb that carbon,(reply>), @Isaac Fulton But just like burning coal you are releasing carbon into the air not to mention you have remove trees,(reply>), While true you can have waste as long as it's an amount that the environment can handle absorbing. I'd say we're probably not there yet and it's imperative we keep working towards it.