Engineering
Since the COVID-19 pandemic began, more companies have offered remote work options for their employees, or have even switched to working entirely remotely—leaving empty office buildings a new fixture in many cities. In ...
Jul 14, 2023
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Energy & Green Tech
Some homeowners looking to switch out their heating and cooling systems are turning to home geothermal—also known as ground source—heat pumps. It's a technology that relies on a simple physical fact: Dig several feet ...
Jul 13, 2023
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Energy & Green Tech
As Germany looks to a future without fossil fuels, a big white boxy appliance is generating a lively debate—and often a heated one—for its potential to replace emissions-heavy oil and gas boilers.
Jul 7, 2023
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Energy & Green Tech
With global warming on the rise, it has become imperative to reduce fossil fuel dependency and switch to alternate green energy sources. The development of electric vehicles is a move towards this direction. However, electric ...
Jun 26, 2023
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Robotics
The air taxi market is almost ready for take off, with companies such as Boeing, Hyundai, Airbus and Toyota building fleets to have commuters flitting through the sky. Europe and the U.S. have both drafted new rules to pave ...
Jun 20, 2023
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Business
Amazon's cloud computing unit Amazon Web Services experienced an outage on Tuesday, affecting publishers that suddenly found themselves unable to operate their sites.
Jun 14, 2023
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Engineering
The air quality in underground road tunnels tends to be worse than in other road environments due to the poor air circulation. To address this issue, researchers at the Korea Institute of Civil Engineering and Building Technology ...
Jun 5, 2023
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Energy & Green Tech
As the aviation industry seeks to cut its carbon footprint, Boeing has just signed a deal to help its quest for a sustainable jet fuel, and it's tied to an unlikely source: the ocean.
Jun 2, 2023
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Business
Cryptocurrency transactions may be costing more than just transaction fees. The electricity used for these transactions is more than what some countries, like Argentina and Australia, use in an entire year.
May 22, 2023
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Energy & Green Tech
Eight EU member states including France, Italy and Poland urged Brussels to scrap its planned vehicle emissions limits, warning they risked hurting investment in a document seen by AFP Monday.
May 22, 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
