More than 80 million Americans suffer from seasonal allergies due to airborne pollen, according to the U.S. Centers for Disease Control and Prevention (CDC). Associated medical costs exceed $3 billion every year, with nearly ...
Environment
6 hours ago
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13
Nitrogen oxides (NOx) form aerosols and ozone in the atmosphere and are significant contributors to air pollution and climate change. China is the largest emitter, yet accurate and timely information on NOx emissions in China ...
Environment
May 9, 2024
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1
Every resident of the West Midlands lives in an area exceeding the World Health Organization's air quality guidelines, and air pollution in the region is causing up to 2,300 premature deaths each year according to new research.
Environment
May 9, 2024
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9
The Canadian wildfires of June 2023 exposed a large portion of the Northeastern United States to unprecedented levels of smoke. A new model that combines wildfire smoke forecasts and data from ground-based sensors may help ...
Earth Sciences
May 9, 2024
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10
Capturing carbon dioxide (CO2) from the atmosphere to store underground "sounds too good to be true", a climate expert told AFP, yet the technology to increase its capacity tenfold is already being tested.
Environment
May 8, 2024
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The death toll from devastating floods that have ravaged southern Brazil for days surpassed 100 on Wednesday, authorities said, as the search for dozens of missing people was interrupted by fresh storms.
Environment
May 8, 2024
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23
While significant strides have been made in improving air quality in China through regulations like the Clean Air Act issued in 2013, air pollution has become increasingly complex. Despite notable improvements, the development ...
Environment
May 6, 2024
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26
With dancing ribbons of light visible in the sky, a team of researchers flew on a series of scenic and sometimes stormy flights into the cold unknown, trying to learn more about why one of the most frigid places on Earth ...
Earth Sciences
May 3, 2024
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17
Fourth-grader Ella Araza sat on a tiny plastic box in her Manila slum home, trying to finish her homework before the afternoon sun sent temperatures soaring to unbearable levels.
Environment
May 2, 2024
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1
Imagine working during a heat wave, standing over a boiling hot stove in a busy restaurant with no air conditioning, limited ventilation and no access to a break until you've worked five consecutive hours.
Economics & Business
May 2, 2024
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1
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
