The Water Cycle
Water is essential for all life on Earth; only 2% in organisms, ice, held in soil ? most water free flowing or in atmosphere
Groundwater: 25% of water use in the U.S.; very slow flow and very long turn-over and replenishing times
Transpiration: Loss of water from plants to atmosphere; most of tropical rain forest rain comes from plant transpiration
Deforestation can turn rain forest into desert b/c lack of transpirationcauses lack of rain.Reforestation is notpossible because therain is lacking!