Update. This method is now being touted as the solution to global warming, as we can see in the following interview in New Scientist magazine with James Lovelock. (The originator of the famous Gaia Theory).
New Scientist: So are we doomed?
James Lovelock: There is one way we could save ourselves and that is through the massive burial of charcoal. It would mean farmers turning all their agricultural waste - which contains carbon that the plants have spent the summer sequestering - into non-biodegradable charcoal, and burying it in the soil. Then you can start shifting really hefty quantities of carbon out of the system and pull the CO2 down quite fast.
New Scientist: Would it make enough of a difference?
James Lovelock: Yes. The biosphere pumps out 550 gigatonnes of carbon yearly; we put in only 30 gigatonnes. Ninety-nine per cent of the carbon that is fixed by plants is released back into the atmosphere within a year or so by consumers like bacteria, nematodes and worms. What we can do is cheat those consumers by getting farmers to burn their crop waste at very low oxygen levels to turn it into charcoal, which the farmer then ploughs into the field. A little CO2 is released but the bulk of it gets converted to carbon. You get a few per cent of biofuel as a by-product of the combustion process, which the farmer can sell. This scheme would need no subsidy: the farmer would make a profit. This is the one thing we can do that will make a difference, but I bet they won't do it.
[Ama divers pulling boat out of the water. From Japanese web-site. -
Amazon explorers uncover signs of a real El Dorado
Swimming in rainforest rivers
Latest Archeology findings on the Amazon
Ancient white skinned Cloud People in Peru.