It appears that we can get rid of all the carbon that we have put in the air by just caring for the soil in our farmland. If we spread 1/2 of an inch of charcoal on all the farmland in the US, it would offset all the carbon humans released into the the atmosphere in 2006. Of course, in that form, it probably would not help our plants much, but if it were spread through the top couple inches of soil as humus, it would be very beneficial, increasing resistance to flooding and drought, as well as making the soil more fertile. Then we could drive all the SUV’s we wanted, and still not cause global warming. But, in order to do this to the farmland, we would need to shift how we farm—growing the soil, so it grows us food, instead of just making field factories crank out carbohydrate and protein nutrient paste. And this shift in philosophy would probably result in better health and wellness and less dependence on SUV’s anyway. We need to change something, because adding half an inch of carbon to the soil each year may be difficult.
Here is the math and sources behind my claim:
8.4 gigatonnes in 2006:
divided by
938 million acres of US farmland
divided by
208 kg/cu. meter: density of charcoal
divided by
90% carbon in charcoal
equals:
0.47 in deep
Of course, if the whole world helped out, instead of just the US farmland, we wouldn’t have to make our soil quite so much better each year.
