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Water is a ubiquitous chemical substance that is composed of hydrogen and oxygen and is essential for all known forms of life. In typical usage, ''water'' refers only to its liquid form or state, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam. 21 kilograms) of water-->Water covers 71% of the Earth's surface. On Earth, it is found mostly in oceans and other large water bodies, with 1.6% of water below ground in aquifers and 0.001% in the air as vapor, clouds (formed of solid and liquid water particles suspended in air), and precipitation. , Special Report, , December 1995 (linked 4/2007). UNEP. Oceans hold 97% of surface water, glaciers and polar ice caps 2.4%, and other land surface water such as rivers, lakes and ponds 0.6%. A very small amount of the Earth's water is contained within biological bodies and manufactured products. Water on Earth moves continually through a cycle of evaporation or transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Over land, evaporation and transpiration contribute to the precipitation over land. Clean, fresh drinking water is essential to human and other lifeforms. Access to safe drinking water has improved steadily and substantially over the last decades in almost every part of the world. There is a clear correlation between access to safe water and GDP per capita., Gapminder video However, some observers have estimated that by 2025 more than half of the world population will be facing water-based vulnerability. Water plays an important role in the world economy, as it functions as a solvent for a wide variety of chemical substances and facilitates industrial cooling and transportation. Approximately 70% of freshwater is consumed by agriculture.
[edit] About Water
Water is a liquid made up of hydrogen and oxygen.
Recipes With Water
Water
Water
Gelatin, Water
Orange Juice, Water
Chopped Nuts, Water
