News tagged with air

Related topics: air pollution , air quality , pollution

Australia to sell biggest health insurer

The conservative government of Prime Minister Tony Abbott on Wednesday said it would press ahead with the sale of Australia's largest health insurer Medibank Private via an initial public offering.

Mar 26, 2014
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China to provide more baby safe havens

China will provide safe havens for parents to abandon unwanted children across most of the country, despite debate on whether they could see more babies dumped, state media reported.

Feb 17, 2014
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Overweight or obese people breathe more air pollutants

(Medical Xpress)—Overweight or obese adults can breathe 7-50% more air per day than an adult with healthy weight does, which makes them more vulnerable to air contaminants causing asthma and other pulmonary diseases, according ...

Feb 05, 2014
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Earth's atmosphere

The Earth's atmosphere is a layer of gases surrounding the planet Earth that is retained by the Earth's gravity. It has a mass of about five quadrillion metric tons. Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night.

There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. An altitude of 120 km (75 mi) marks the boundary where atmospheric effects become noticeable during atmospheric reentry. The Kármán line, at 100 km (62 mi), is also frequently regarded as the boundary between atmosphere and outer space. Three quarters of the atmosphere's mass is within 11 km (6.8 mi; 36,000 ft) of the surface.

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