Engineering
Metal processing with lasers and plasma releases many different pollutants into the ambient air. The Fraunhofer Institute for Material and Beam Technology IWS, together with partners, has developed a filter system that efficiently ...
Oct 1, 2021
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24
Energy & Green Tech
Electric vehicles play a key role in China's plan to improve air quality and reduce CO2 emissions but, with the majority of China's electricity still coming from coal-fired power plants, many question just how effective this ...
May 1, 2018
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61
Energy & Green Tech
Engineers at Georgia Tech have designed a process that converts carbon dioxide removed from the air into useful raw material that could be used for new plastics, chemicals, or fuels.
Apr 26, 2024
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54
Business
The US arm of Britain's Rolls Royce won a contract worth up to $2.6 billion Friday to supply engines for the US Air Force's B-52H bomber fleet, the Air Force announced.
Sep 25, 2021
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31
Hi Tech & Innovation
A study by researchers from Nanyang Technological University, Singapore (NTU Singapore) has found that Singaporeans are open to riding air taxis, which are small autonomous aircraft that carry passengers over short distances. ...
May 28, 2024
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6
Computer Sciences
Using artificial intelligence, Cornell engineers have simplified and reinforced models that accurately calculate the fine particulate matter (PM2.5)—the soot, dust and exhaust emitted by trucks and cars that get into human ...
Jan 12, 2023
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50
Hi Tech & Innovation
The release of the advanced chatbot ChatGPT in 2022 got everyone talking about artificial intelligence (AI). Its sophisticated capabilities amplified concerns about AI becoming so advanced that soon we would not be able to ...
Jul 31, 2023
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Energy & Green Tech
In pursuit of a carbon-neutral society, advancement of the battery technology becomes imperative. Primary batteries, though non-rechargeable, hold promise as power sources for sensors and disaster scenarios because of their ...
Oct 17, 2023
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Business
European aircraft giant Airbus said Friday it will maintain production of its workhorse A320 plane at 40 per month to mid-2021 when it expects the aviation industry to have recovered from the coronavirus pandemic.
Oct 23, 2020
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4
Energy & Green Tech
Ian Marius Peters, now an MIT research scientist, was working on solar energy research in Singapore in 2013 when he encountered an extraordinary cloud of pollution. The city was suddenly engulfed in a foul-smelling cloud ...
Aug 29, 2018
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105
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
