Energy & Green Tech
Colossal freight locomotives are a fixture of the American landscape, but their 4,400-horsepower engines collectively burn 3.5 billion gallons of diesel annually, at a time when railroads and other fossil fuel users face ...
Jul 7, 2021
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5
Business
Airlines canceled hundreds of flights as the omicron variant jumbled schedules and drew down staffing levels at some carriers during the busy holiday travel season.
Dec 24, 2021
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Business
A new study published in the journal Cell Reports Sustainability focuses on the air quality and climate benefits of wind and solar energy.
May 31, 2024
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Consumer & Gadgets
Researchers and policymakers are advocating all-electric housing to reduce energy bills and emissions. Using energy-efficient reverse-cycle air conditioners is a core element of the shift from gas.
Oct 2, 2023
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Energy & Green Tech
The struggle to cut emissions is real. Last year, the world emitted more than 37 billion metric tons of carbon dioxide, setting a new record high. As a result, sucking CO2 out of the atmosphere has become an increasingly ...
Jul 22, 2024
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Energy & Green Tech
The pressure is on for California to meet its clean-vehicle goals. In less than two years, 35% of vehicles sold must have zero tailpipe emissions. And by 2035, all light-duty vehicles sold must be zero-emissions.
Jun 14, 2024
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Energy & Green Tech
The next group of electric vehicle charging station grants from Minnesota's Volkswagen emissions-cheating settlement will prioritize projects that incorporate solar panels or other sources of local clean energy.
Dec 12, 2020
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10
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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6
Engineering
Whether in photosynthesis or in a photovoltaic system: If you want to use light efficiently, you have to absorb it as completely as possible. However, this is difficult if the absorption is to take place in a thin layer of ...
Aug 29, 2022
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Engineering
Temperatures around the world are soaring. Both California's Death Valley and China's Xinjiang region have seen temperatures climb above the 50℃ mark. A blistering heat wave is also sweeping across the Mediterranean, causing ...
Jul 21, 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
