More than 80 percent of the world’s energy now comes from fossil fuels, and every bit of it is mined from the earth.*1 That is another way of saying that all the fossil fuels humankind will ever have are already here, waiting to be extracted from the ground—in contrast to food, which is grown every season from the soil, and freshwater, which is drawn in constant but limited amounts from rivers, lakes, and aquifers.
