Maybe some of the ecological aspects, but changing the atmosphere and climate sounds like a risky affair. I'm pretty sure if we were able to do some heavy hand

Maybe some of the ecological aspects, but changing the atmosphere and climate sounds like a risky affair. I'm pretty sure if we were able to do some heavy handed climate modification, we would want to do it somewhere else, not in a fragile environment like Earth where extinction or at least long-term catastrophe of many ecosystems is on the table.