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
Building construction and operation account for 16% and 22%, respectively, of total carbon emissions in China. Those numbers are down, but still need significant work to achieve green building construction and carbon neutrality, ...
Jul 7, 2022
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Business
Commercial aviation is critical to the global economy. In 2019, it supported more than 65 million jobs and had a global economic impact of US$2.7 trillion. The COVID-19 pandemic has been unlike any crisis, both in terms of ...
Jul 1, 2022
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Automotive
The new head of the government's road safety agency says it will intensify efforts to understand the risks posed by automated vehicle technology so it can decide what regulations may be necessary to protect drivers, passengers ...
Jun 29, 2022
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Energy & Green Tech
If you're anything like me, you're increasingly working from home, one that was built before energy efficiency measures were introduced in Australia.
Jun 17, 2022
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Hi Tech & Innovation
Spain's Air Nostrum has become the first airline to reserve 100-seat helium airships that emit just one tenth of harmful emissions produced by jet planes, their British manufacturer said Wednesday.
Jun 15, 2022
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Energy & Green Tech
As millions of Americans hop on airplanes heading to favorite vacation spots, the industry is gearing for a bigger journey—one that will tackle removing the carbon emissions from those flights over the next 30 years.
Jun 9, 2022
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Telecom
A space-enabled system to help clear congested skies while reducing carbon emissions is going global, following a deal signed today between satellite communications provider Inmarsat and ESA.
Jun 9, 2022
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Consumer & Gadgets
Apple on Monday provided a peek at upcoming tweaks to the software that powers more than 1 billion iPhones and rolled out two laptops that will be the first available with the next generation of a company-designed microprocessor.
Jun 6, 2022
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Energy & Green Tech
As CO2 emissions continue to grow, the world is becoming ever more reliant on the removal of carbon dioxide from the atmosphere to achieve urgent climate targets. Direct air capture (DAC) is a promising novel technology for ...
Jun 6, 2022
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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
