Get our free book (in Spanish or English) on rainwater now - To Catch the Rain.
Water is vital for all known forms of life. Covering 71% of the Earth's surface, it is found mostly in oceans and other large water bodies. 1.6% of the total mass of the Earth's water is below ground in aquifers and 0.001% is in the air as vapor, clouds, and precipitation (rain, snow and sleet).
The Earth's water moves constantly through a cycle of evaporation and transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Over land, evaporation and transpiration contribute to the precipitation over land - thus deforestation and other changes to land can have wide and long-lasting effects through their impact on the water cycle.
|This page or section includes content from Wikipedia. The original article was at Outline of water. The list of authors can be seen in the history for that page. As with Appropedia, the text of Wikipedia is available under the CC-BY-SA.|