Engineering
One afternoon, a dozen Arizona State University students gathered to spend the morning cutting cardboard, taping fans and assembling filters in an effort to build 125 portable air purifiers for local schools. That same morning, ...
Mar 4, 2022
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Energy & Green Tech
Researchers from Tokyo Metropolitan University have developed a new carbon capture system that removes carbon dioxide directly from the atmosphere with unprecedented performance. Isophorone diamine (IPDA) in a "liquid-solid ...
May 30, 2022
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Energy & Green Tech
(Tech Xplore)—UK-based Highview Power Storage is a company to watch in the energy storage market—using liquefied air as the energy storage medium. When the liquid air warms up it expands and can drive a turbine to make ...
Robotics
Engineers at UC Riverside have unveiled an air-powered computer memory that can be used to control soft robots. The innovation overcomes one of the biggest obstacles to advancing soft robotics: the fundamental mismatch between ...
Jul 16, 2021
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Energy & Green Tech
Can you use textiles to clean the air? Take sunlight. Add a film coating to fabric. And you get curtains that destroy pollutants and purify the air inside your home. The recipe is being touted by Ikea. Along with bunk beds ...
Energy & Green Tech
Scientists at Aarhus University in Denmark studying the effects of climate change on weather-dependent electricity systems have found a silver lining in Earth's otherwise fraught future outlook. Temperatures may climb and ...
Mar 6, 2019
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Energy & Green Tech
It is a truth universally acknowledged that the Earth's average temperature is rising—nine of the ten warmest years ever recorded in National Oceanic and Atmospheric Administration National Oceanic and Atmospheric Administration ...
Apr 23, 2020
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Energy & Green Tech
Polluting emissions from Chinese thermal power plants declined significantly between 2014 and 2017, according to research involving UCL.
Oct 7, 2019
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Energy & Green Tech
Millions of U.S. households would benefit from heat pumps, but the cost of installing the technology needs to come down to make their use a more attractive proposition, according to researchers at the U.S. Department of Energy's ...
Feb 13, 2024
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Energy & Green Tech
A quickly growing global population presents a variety of challenges, and raises the critical question: How can we sustainably meet energy needs while considering—and preventing—environmental and human impacts? An ever-increasing ...
May 30, 2016
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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
