Almost 40% of Americans live with dirty air: Report
Nearly 40% of Americans live where the air is polluted enough to harm them, a new report warns.
8 hours ago
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Nearly 40% of Americans live where the air is polluted enough to harm them, a new report warns.
8 hours ago
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Since developing countries have both lower levels of hospital infrastructure and serious health shocks driven by air pollution, how responsive are their health care systems to these health shocks? In a new study, researchers ...
Apr 23, 2024
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Active military service may heighten a woman's risk of having a low birthweight baby, suggests a review of the available scientific evidence published online in the journal BMJ Military Health.
Apr 22, 2024
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A study by researchers at National Jewish Health published in the Annals of Allergy, Asthma & Immunology reports that air pollutants—including particulate matter, pollen, greenhouse gases, and other harmful substances—can ...
Apr 22, 2024
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The U.N. labor organization warned Monday that over 70% of the world's workforce is likely to be exposed to excessive heat during their careers, citing increased concern about exposure to sunlight. It also warned of air pollution, ...
Apr 22, 2024
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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