Charcoal and topsoil loss
When I read stories like “Where Food Begins” I want to add National Geographic to the president’s reading list. Because, his one-page “intelligence briefings” just aren’t doing the job. Here’s a real, tangible threat to national and global security – one we can do something about for very little money (but which the free market won’t fix) – so you’d think that “conservatives” would want to do something about it.
Turns out, the ancient Amazonians knew how to do something about it. They systematically buried pottery and charcoal in their fields over a two thousand year period. Weird, but get this – the result was rich soil six feet deep instead of 8 inches like the rest of the Amazon basin. And if we did something similar in our mechanized fields, we could lock up enough carbon in the soil to offset a huge chunk of our carbon dioxide output in the bargain.