Energy & Green Tech
About 40 percent of all the energy consumed by buildings worldwide is used for space heating and cooling. With the warming climate as well as growing populations and rising standards of living—especially in hot, humid regions ...
Jul 12, 2018
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Energy & Green Tech
Not familiar with residential geothermal heating? No surprise. Chris Martin in Bloomberg explained that "Residential geothermal heating is uncommon, in part because the expense and effort to dig the wells make them costly ...
Telecom
Five years ago, a team of researchers from the University of Texas at Austin boarded an $80-million yacht with the intent of trying to fool the vessel's navigation system and stealthily push it off course.
Mar 23, 2018
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Hi Tech & Innovation
Google's penchant for giving us answers, in its new era of AI, is a gift that keeps on giving. A new item in Google's gift bag: extra trimmings on Google Flights.
Energy & Green Tech
All of Norway's short-haul airliners should be entirely electric by 2040, the country's airport operator said on Wednesday, cementing the Nordic nation's role as a pioneer in the field of electric transport.
Jan 17, 2018
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Energy & Green Tech
A two-in-one solar bio-battery and solar panel has been created by researchers who printed living cyanobacteria and circuitry onto paper.
Nov 6, 2017
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Energy & Green Tech
China is rapidly expanding its solar power supply, hoping to meet 10 percent of the nation's electricity needs with solar energy by 2030. But there's a problem: severe air pollution is blocking light from the sun, significantly ...
Oct 23, 2017
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Energy & Green Tech
(Tech Xplore)—Carbon reduction is one part of the battle as countries and organizations do their bit to save our planet. Another goal drawing considerable interest now is carbon removal.
Energy & Green Tech
University of Sydney researchers have found a solution for one of the biggest stumbling blocks preventing zinc-air batteries from overtaking conventional lithium-ion batteries as the power source of choice in electronic devices.
Aug 15, 2017
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Engineering
Anupam Sharma pulled an accordion folder from the bookshelf above his Iowa State University desk. Inside was the carefully collected and preserved wing of a short-eared owl.
Aug 15, 2017
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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
