Quote Originally Posted by Muzzard
I'm hoping this is a level, but just in case.

Yes, humans did not contribute much to the climate in the past few hundred million years, just for the past hundred or so years. Yes, the climate used to be much warmer and there used to be much more CO2 in the atmosphere. Do you also know, that e.g. during most of the mesozoic period, sea levels were about 200 meters (650 feet) higher than now? Or that seasons or permanent ice did not exist anywhere on the planet? Or that for example oxygen levels were roughly 60-75% of the current levels? Might also be worth noting that while average surface air temperatures were about 10C higher than now, equatorial ocean waters were too warm to harbor any sea life, and all land not directly connected to the sea would have been deserts. Yes, there was life on the planet during those times, but no humans, or pretty much any other lifeforms found on the planet today.