Global Warming Sparked By Ancient Farmers - REDICULOUS!

Link to the CNN Article

I just read this article and am truly disgusted at the lack of science involved. The author of this ridiculous study, William Ruddiman, is making too many unsubstantiated assumptions about the farming practices of ancient man. We are still learning things about civilizations from 3000 years ago, let alone 5, 6, or 7,000 years ago, which is when he says these farmers slashed and burned their way through the forests causing global warming.
Did he just conveniently forget that only a few HUNDRED years ago we had the Little Ice Age? How in the world could the slash and burn tactics of ancient man have anything to do with our current climate change in light of that? It has nothing to do with it, and it’s too long ago to have any real impact now.
Even if they did slash and burn that much, there was more vegetation on the planet at that time and the plant life would have sucked up most of the CO2 before it became a problem.
This article serves no real purpose other than to feed into the global warming lie. The author of the study is grasping at straws trying to prove that global warming is real and is conveniently leaving out fact to support his opinion. Shame on him for being an idiot. Shame on CNN for even publishing the story.