How much energy does desalinisation use? Is it absurdly cheap? File:Plant metabolism during daytime vs. at night.png Wikimedia Commons Electricity from coal comes from turning heat into motion and then into power in a closed steam cycle. Coal is burned in a furnace to heat water inside a boiler, producing high Plante araigne : que signifient vraiment les feuilles jaunes et les 3 gestes qui la sauvent en intrieur Marie France, magazine fminin