In the wake of the COVID-19 pandemic, the U.S. Centers for Disease Control and Prevention recommends that people wear masks in public. Because N95 and surgical masks are scarce and should be reserved for health care workers, ...
Bio & Medicine
Apr 24, 2020
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11757
The World Meteorological Organisation said Wednesday that the ozone hole is expected to be smaller in 2009 than a year ago.
Earth Sciences
Sep 16, 2009
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0
The protective goggles are tight, the chin strap secure. Conditions are calm and the lasers are ready; the air is infused with tiny aerosol particles that are primed to scatter and track at the slightest disruption. Wait ...
Plants & Animals
Dec 5, 2016
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3725
While the effects of power plant emissions, vehicle exhaust and other manmade aerosols on air quality and public health are well-known, their impact on the climate is not completely understood. Scientists have shown that ...
Earth Sciences
Jan 22, 2016
6
1012
(PhysOrg.com) -- Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric ...
Earth Sciences
Oct 14, 2010
327
0
The January 15, 2022 eruption of underwater Hunga Tonga–Hunga Ha'apai volcano triggered a tsunami that flattened buildings, displaced residents, and resulted in at least four deaths across the islands of Tonga. The powerful ...
Environment
Oct 25, 2022
3
409
The poles are warming several times faster than the global average, causing record smashing heatwaves that were reported earlier this year in both the Arctic and Antarctic. Melting ice and collapsing glaciers at high latitudes ...
Environment
Sep 16, 2022
52
587
According to a new paper in Oxford Open Climate Change, the strategies humanity must pursue to reduce climate change will have to include more than reducing greenhouse gases. This comes from an analysis of climate data led ...
Environment
Nov 2, 2023
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210
The amount of radiation released during the Fukushima nuclear disaster was so great that the level of atmospheric radioactive aerosols in Washington state was 10,000 to 100,000 times greater than normal levels in the week ...
Environment
Sep 9, 2011
5
0
The protective ozone layer in the earth's upper atmosphere has stopped thinning and should largely be restored by mid century thanks to a ban on harmful chemicals, UN scientists said on Thursday.
Earth Sciences
Sep 16, 2010
6
0
Technically, an aerosol is a suspension of fine solid particles or liquid droplets in a gas. Examples are clouds, and air pollution such as smog and smoke. In general conversation, aerosol usually refers to an aerosol spray can or the output of such a can. The word aerosol derives from the fact that matter "floating" in air is a suspension (a mixture in which solid or liquid or combined solid–liquid particles are suspended in a fluid). To differentiate suspensions from true solutions, the term sol evolved—originally meant to cover dispersions of tiny (sub-microscopic) particles in a liquid. With studies of dispersions in air, the term aerosol evolved and now embraces both liquid droplets, solid particles, and combinations of these. The Earth atmosphere contains aerosols of various types and concentrations, including quantities of:
By far the most common aerosols in the atmosphere are clouds, which normally consist of suspensions of water droplets or ice particles of greater or lesser density.
Aerosols can be found in urban Ecosystems in various forms, for example:
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