By merely letting our present momentum sweep us on with it, we can grind through the world's last wild places swiftly. Just the undisciplined dash for energy sources can by itself obliterate wilderness. Eventually the sources will be gone -- the damsites, the fossil fuels, the places to isolate atomic waste if we ever find them -- so we will learn to use less energy, not more; to live within the earth's income instead of exploding and spilling our way through the capital the earth took thousands of millions of years to acquire.