Consumer & Gadgets
Apple is rolling out new Mac computers powered by the same kind of chips that run iPhones and iPads, a move aimed at making it easier for its most popular products to work together.
Nov 10, 2020
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Energy & Green Tech
NIMS and Softbank Corp. have developed a lithium-air battery with an energy density over 500Wh/kg—significantly higher than that of current lithium ion batteries. The research team then confirmed that this battery can be ...
Jan 20, 2022
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Engineering
Nations around the world are rapidly developing high-energy laser weapons for military missions on land and sea, and in the air and space. Visions of swarms of small, inexpensive drones filling the skies or skimming across ...
Mar 8, 2024
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Business
Electric cars—and their continued sales growth—are expected to have a greener, cleaner influence on air pollution and reduce human mortality in most, if not all, U.S. metropolitan areas, according to Cornell University ...
Dec 8, 2022
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Energy & Green Tech
Zinc-air batteries, which produce electricity through a chemical reaction between oxygen in the atmosphere and zinc, are considered to be next-generation candidates to meet the explosive demand for electric vehicles instead ...
Apr 7, 2022
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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
With its high-carbon footprint, air travel challenges the goal set by many countries of stabilizing global mean temperature by the middle of the 21st century. The aviation sector could achieve net-zero carbon emissions by ...
Feb 7, 2023
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Business
The Boeing 747 is an iconic jumbo jet that revolutionized air travel and tourism, allowing affordable flights for millions of people eager to see the world.
Jul 29, 2020
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Business
European aircraft giant Airbus posted record profits in 2021 after two years of losses as it cruises past the pandemic-induced crisis in the travel industry, company results showed Thursday.
Feb 17, 2022
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Engineering
Buildings are Europe's largest energy consumer. They are responsible for about 40% of the energy consumed and 36 % of greenhouse gases emitted in the EU. However, a mere 1% undergo energy renovations each year. To meet Europe's ...
May 5, 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
