Energy & Green Tech
Researchers at the Paul Scherrer Institute PSI and ETH Zurich have performed calculations to work out how air traffic could become climate-neutral by 2050. They conclude that simply replacing fossil aviation fuel with sustainable ...
Jul 6, 2023
0
40
Automotive
Fleets of commercial vehicles that operate in large towns and cities could halve their emissions and better meet clean air targets using a new technology developed by Aston University researchers, which imitates how ants ...
Jul 24, 2020
0
2
Energy & Green Tech
California will ban the sale of new gasoline-powered passenger cars and trucks in 15 years, Gov. Gavin Newsom announced Wednesday, establishing a timeline in the nation's most populous state that could force U.S. automakers ...
Sep 23, 2020
0
28
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
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
0
49
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
Business
Airlines are recovering from huge COVID fallout but face fresh turbulence from rocketing inflation while airports battle to cope with booming demand.
Jul 15, 2022
0
32
Business
US regulators are getting close to undertaking a test flight of Boeing's grounded 737 MAX and could schedule the key step for as soon as next week, two sources said Friday.
Jun 26, 2020
0
7
Business
Delta Air Lines is switching to bamboo cutlery for fresh packaged meals in first class as part of a broader effort to reduce single-use plastics on flights.
Feb 7, 2022
0
4
Business
Airbus came out strongly at the Dubai Airshow on Sunday with a group order for 255 single-aisle A321 aircraft, marking the first major deal of its kind since the pandemic began.
Nov 14, 2021
0
6
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
