Internet
Recent research suggests that heart attacks, cerebral stroke, and asthma attacks all rise with increasing air pollution in our cities, and of course the wider problems for the environment and human, animal, and plant life ...
Oct 24, 2019
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Engineering
Researchers are one step closer to integrating air taxis and other electric vertical takeoff and landing (eVTOL) vehicles into the country's busiest airports, thanks to a new air traffic simulation developed by NASA's Ames ...
Dec 21, 2023
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Engineering
A study of different solar cooker designs has alighted on the optimal form and structure, which can be constructed or bought in the developing world. The most efficient available design meshes well with mathematical models ...
Jul 15, 2022
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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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Energy & Green Tech
Direct air capture was identified as one of the "seven chemical separations to change the world." This is because although carbon dioxide is the main contributor to climate change (we release ~40 billion tons into the atmosphere ...
Jul 19, 2024
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Engineering
Chances are you've never considered the act of breathing. Our lungs' gentle rise and fall is autonomic, pulling air in and nourishing our body with oxygen before expelling wastes like carbon dioxide (CO2).
Aug 19, 2024
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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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Automotive
After hours of routine operations, an air traffic controller gets a radio call from a small aircraft whose cockpit indicators can't confirm that the plane's landing gear is extended for landing. The controller arranges for ...
Jan 31, 2024
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Robotics
This research project was originated from the collaboration between two institutions with their respective expertise: The TIPs laboratory of the ULB, in Belgium, which is a group dedicated to the study of transport phenomena ...
Apr 1, 2021
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Energy & Green Tech
To avoid catastrophic climate impacts, excessive carbon emissions must be addressed. At this point, cutting emissions isn't enough. Direct air capture, a technology that pulls carbon dioxide out of ambient air, has great ...
May 2, 2024
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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
