Engineering
Indoor air pollution may have met its match. Today, scientists will report that they have designed catalyst-coated lampshades that transform indoor air pollutants into harmless compounds. The lampshades work with halogen ...
Aug 16, 2023
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Business
Commercial airlines have faced a tricky balancing act this summer, ramping up service to meet torrid travel demand in a period of labor shortages and supply chain constraints.
Aug 13, 2023
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Energy & Green Tech
The US government said Friday it will spend up to $1.2 billion for two pioneering facilities to vacuum carbon out of the air, a historic gamble on a still developing technology to combat global warming that is criticized ...
Aug 11, 2023
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Energy & Green Tech
Long Beach aims to launch an e-bike lending program to provide residents with up to 40 bikes—in one of the latest efforts in California to increase accessibility with green transportation.
Aug 8, 2023
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Business
U.S. regulators are warning airlines to limit the use of an anti-icing system on Boeing 737 Max jets in dry air to avoid overheating engine-housing parts, which could cause them to break away from the plane.
Aug 8, 2023
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Energy & Green Tech
Our climate is changing, and airlines are under pressure to reduce emissions from air travel. For many of us, especially in Australia, flying is an essential form of transport, so how can we reduce its environmental impact? ...
Aug 8, 2023
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Energy & Green Tech
Picture two homes on the same street: one constructed in the 1950s and the other in the 1990s. There are no trees or other shade. The air conditioning units are identical, recently replaced, and operating perfectly. Identical ...
Aug 3, 2023
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Business
Hungarian low-cost airline Wizz Air has ordered another 75 A321neo aircraft, Airbus said Wednesday, in a deal worth $10 billion at list prices.
Aug 2, 2023
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2
Engineering
In June, the American Society of Heating and Air-Conditioning Engineers (ASHRAE) approved Standard 241, which establishes minimum requirements for building owners, operators and professionals to improve indoor air quality ...
Aug 2, 2023
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39
Energy & Green Tech
With air conditioner demand surging, scientists are looking for ways to improve the energy efficiency of cooling systems and limit damaging emissions that accelerate global warming.
Aug 2, 2023
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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
