Three meters are not enough to ensure protection. Even at that distance, it takes less than five minutes for an unvaccinated person standing in the breath of a person with COVID-19 to become infected with almost 100 percent ...
Dec 3, 2021
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A plea issued by 239 scientists from around the world to recognize and mitigate airborne transmission of COVID-19 addressed to international health authorities is to be published in the journal Clinical Infectious Diseases.
Jul 6, 2020
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Airborne transmission of viruses, like the virus causing COVID-19, is not well understood, but a good baseline for study is a deeper understanding of how particles travel through the air when people cough.
May 19, 2020
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Lead poisoning has a far greater impact on global health than previously thought, potentially contributing to over five million deaths a year and posing a similar threat to air pollution, modeling research suggested Tuesday.
Sep 12, 2023
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Essential oil diffusers could be a source of pollution in the home, the French food and environmental safety agency warned Tuesday.
Apr 28, 2020
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Joints emit a variety of noises, including popping, snapping, catching, clicking, grinding, grating and clunking. The technical term for these noises is "crepitus", from the Latin "to rattle". People of all ages can experience ...
Mar 12, 2019
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With numerous studies documenting air pollution's link to heart-related illness and death, two leading American physicians are calling on their peers to begin screening patients for exposure to indoor and outdoor air pollution ...
Nov 10, 2021
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Risk researchers are asking new questions about the health and safety implications and how to mitigate any potential health risks to users of 3-D printers and consumers of products manufactured with this emerging technology, ...
Dec 15, 2020
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Recent studies show that people infected with the new coronavirus could be spreading "aerosolized" viral particles as they cough, breathe or talk in a 13-foot radius, and viral particles can also move around on people's shoes.
Apr 17, 2020
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The new coronavirus can live in the air for several hours and on some surfaces for as long as two to three days, tests by U.S. government and other scientists have found.
Mar 12, 2020
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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
