News tagged with water

Related topics: drinking water , climate change , water molecules , liquid water , ocean

Dirty water raising health risk in flooded Kashmir

The floodwaters are finally receding in much of Kashmir, but health experts worry a crisis could be looming with countless bloated livestock floating across the waterlogged region and hundreds of thousands ...

6 hours ago
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Drink up for exercise, but not too much

With students heading back to school, fall sports are in full swing. In addition to training, eating right, and getting enough sleep, a significant key to health and performance is staying hydrated. However, the recent tragic ...

Aug 27, 2014
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Capturing false hormones

They damage our ability to reproduce, and they pollute the natural environment. Yet chemicals known as hormone mimics can be found in consumer goods. Eventually they end up in our water. But we now have a way of capturing ...

Aug 15, 2014
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First lady tells America to 'Drink Up' more water

Michelle Obama is expanding her push for America to drink more water, as the White House claims partial responsibility for helping to boost nearly $1 million in bottled water sales among consumers since the national "Drink ...

Jul 22, 2014
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Take 5: How to beat the heat

Your smartphone's weather app informs you of the impending heat wave and yet you refuse to skip your daily five-mile runs through downtown Boston. You've just spent the balance of the day studying at the ...

Jul 10, 2014
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Water

Water is a ubiquitous chemical substance, composed of hydrogen and oxygen, that is essential for the survival of many 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. 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. Saltwater 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. Other water is trapped in ice caps, glaciers, aquifers, or in lakes, sometimes providing fresh water for life on land.

Water moves continually through a cycle of evaporation or transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Winds carry water vapor over land at the same rate as runoff into 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. 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 percent of freshwater is consumed by agriculture.

This text uses material from Wikipedia licensed under CC BY-SA