So we are going to be saved by a farming technique used by savages thousands of years ago. Wonderful. And all of our energy needs will be met by cold fusion, and that perpetual motion machine invented by that guy in the 1700s will finally be figured out and save us, too.
After seeing the replies on this thread I'm wondering who the savages really are. I don't know for sure whether CO2 is causing global warming, but my guess so far is that it is not. However, CO2 is increasing year after year. That's a fact. If this technique works it could have a very positive impact on agricultural productivity as well as lowering CO2 atmospheric concentration, whether that matters or not. This or any other technological adaptation certainly beats giving into the anti-capitalists and signing something stupid like Kyoto.
If you have some knowledge on why this technique won't work, please share your knowledge instead of joining the peanut gallery and making a smartass comment.
I'm very interested in how you know that these people were savages, since no living person has ever had any contact with these peoples. They died out from diseases indavertantly brought to the New World by explorers. They died of these diseases spreading through the indigenous populations without these remote peoples ever knowing where the diseases came from or how to deal with them.
What we do know is that they maintained populations of millions in areas that are now near wilderness. There isn't any reason to think that they were savages, as they were settled agricultural peoples who built massive earthen causeways and raised hillocks for settlement - often nearly a mile across. They lived in villages and towns with populations numbering well into the thousands. They terraformed the Amazon basin, leaving their man-made fertile soils for us to marvel over. They are the exact opposite of the "noble savage" leftists like to fantacize over.
Among all the evidence available to us, I'm not aware of a single element that would lead me to call these ancient peoples savages.