News tagged with air
Related topics: air pollution , air quality , pollution
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 and is available under the GNU Free Documentation License.
Early-life traffic-related air pollution exposure linked to hyperactivity
Early-life exposure to traffic-related air pollution was significantly associated with higher hyperactivity scores at age 7, according to new research from the University of Cincinnati (UC) and Cincinnati Children's Hospital ...
Attention deficit disorders
4 hours ago |
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Jekyll into Hyde: Breathing auto emissions turns HDL cholesterol from 'good' to 'bad'
Academic researchers have found that breathing motor vehicle emissions triggers a change in high-density lipoprotein (HDL) cholesterol, altering its cardiovascular protective qualities so that it actually contributes to clogged ...
Cardiology
May 15, 2013 |
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Prenatal exposure to traffic is associated with respiratory infection in young children
Living near a major roadway during the prenatal period is associated with an increased risk of respiratory infection developing in children by the age of 3, according to a new study from researchers in Boston.
Health
14 hours ago |
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Study finds air pollution and noise pollution increase cardiovascular risk
Both fine-particle air pollution and noise pollution may increase a person's risk of developing cardiovascular disease, according to German researchers who have conducted a large population study, in which both factors were ...
Health
14 hours ago |
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Exposure to traffic pollution increases asthma severity in pregnant women
Air pollutants from traffic are associated with increased asthma severity levels in pregnant asthmatic women, according to a new study.
Health
14 hours ago |
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