Engineering
A new type of energy efficient, ecologically sustainable cooling technology that does not require the use of climate-damaging refrigerants is currently being developed by Professor Stefan Seelecke and his team at Saarland ...
Jun 2, 2022
0
15
Robotics
Hacked bank and Twitter accounts, malicious power outages and attempts to tamper with medical records threaten the security of the nation's health, money, energy, society and infrastructure. Harnessing the laws of nature—namely ...
May 25, 2022
0
293
Energy & Green Tech
Sceptics say that far from helping save the planet, electric cars are a liberal pipe-dream whose environmental benefits are exaggerated.
May 16, 2022
0
43
Automotive
As urban traffic gets more miserable, entrepreneurs are looking to a future in which commuters hop into "air taxis" that whisk them over clogged roads.
May 9, 2022
2
22
Energy & Green Tech
California likely will have an energy shortfall equivalent to what it takes to power about 1.3 million homes when use is at its peak during the hot and dry summer months, state officials said Friday.
May 7, 2022
2
12
Energy & Green Tech
Southwest Research Institute (SwRI) demonstrated the effectiveness of its CAT-DEF technology during the WCX World Congress Experience in Detroit, which took place April 5–7. The advancement successfully reduced heavy-duty ...
May 6, 2022
0
19
Energy & Green Tech
Batteries do the heavy lifting to store excess solar energy on power grids for use after sundown, but to operate, they also rely on pricey elements like platinum.
May 5, 2022
0
25
Energy & Green Tech
India is tapping a new energy source that promises to help clean up smog-choked cities and is already providing a vital revenue stream for poor Indian farmers: truckloads of bovine manure.
Apr 20, 2022
0
11
Automotive
California wants electric vehicle sales to triple in the next four years to 35% of all new car purchases, an aggressive target set as part of the goal to phase out the sale of gas-powered cars by the middle of next decade.
Apr 13, 2022
0
4
Energy & Green Tech
The latest reports from the Intergovernmental Panel on Climate Change show that to avoid massive losses and damage from global warming, nations must act quickly to reduce their greenhouse gas emissions. The good news is that ...
Apr 11, 2022
0
33
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
