We’re currently working on a farm in mid-Ohio and doing research on sustainable agriculture. Last night I was using an old-fashion scythe to cut some high grass. It worked fine, I got some good exercise and the planet is a little better off because I didn’t use a gasoline powered “weed whacker.” Weed whackers, like lawn mowers, have virtually no pollution control devices. So using them emits a significant amount of greenhouse gases. Knowing what we know about global warming at this point, how can we use these things — gas-powered weed whackers, gas-powered lawn mowers, gas powered leaf blowers (How absolutely crazy are those?) — and look our kids, who are inheriting this world, in the eyes? How?