News tagged with water

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

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 ...

11 hours ago
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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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Low doses of arsenic cause cancer in male mice

Mice exposed to low doses of arsenic in drinking water, similar to what some people might consume, developed lung cancer, researchers at the National Institutes of Health have found.

Jul 08, 2014
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Hurricane season has begun: are you ready?

(HealthDay)—As Hurricane Arthur threatens the East Coast of the United States, people are getting an important reminder about safety preparations they need to make for hurricane season.

Jul 03, 2014
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Soda war activists look to tobacco as model

Soft drinks should be targeted like tobacco with consumer warning labels that spell out the risk of obesity and other maladies, American advocates of a war on soda say.

Jun 06, 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