Energy & Green Tech
The notion that hundreds or even thousands of electric-powered air taxis could be whisking people over jammed roads is inching away from science fiction and closer to reality.
Oct 9, 2023
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Consumer & Gadgets
With airplane bathrooms inaccessible to most people with disabilities, those who use wheelchairs have a necessary pre-flight routine: Dehydrate and hope for the best.
Oct 6, 2023
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Energy & Green Tech
As organizations work to reduce their energy consumption and associated carbon emissions, one area that remains to be optimized is indoor heating and cooling. In fact, HVAC—which stands for heating, ventilation, and air ...
Oct 5, 2023
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Automotive
Air taxis may become an important part of the U.S. transportation ecosystem, quickly carrying people relatively short distances—and eventually some may fly without a pilot aboard. NASA is helping prepare for that future ...
Oct 4, 2023
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Engineering
Even as the world slowly begins to decarbonize industrial processes, achieving lower concentrations of atmospheric carbon requires technologies that remove existing carbon dioxide from the atmosphere, rather than just preventing ...
Oct 3, 2023
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Business
Malta will shut down its loss-making national carrier, Air Malta, next year and replace it with a new government-owned airline, Prime Minister Robert Abela has announced.
Oct 3, 2023
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Consumer & Gadgets
Researchers and policymakers are advocating all-electric housing to reduce energy bills and emissions. Using energy-efficient reverse-cycle air conditioners is a core element of the shift from gas.
Oct 2, 2023
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Engineering
As the planet gets hotter, the need for cool living environments is becoming more urgent. But air conditioning is a major contributor to global warming since units use potent greenhouse gases and lots of energy.
Sep 25, 2023
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Business
Air France-KLM announced Monday that it was going to place a "major order" for 50 long-haul Airbus A350s, as part of its effort to introduce more fuel-efficient planes.
Sep 25, 2023
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Engineering
This year's heightened drumbeat of extreme weather shows us how little time we actually have to slash emissions.
Sep 21, 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
