A forest fire at a major national park in western Canada reached an evacuated town on Wednesday evening, with the army preparing to send in reinforcements.
Environment
Jul 25, 2024
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44
In July and August 2021, smoke from wildfires in northwestern Ontario and Manitoba affected air quality in Montreal, according to a study led by Patrick Hayes, a professor in the Department of Chemistry at Université de ...
Earth Sciences
Jul 24, 2024
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1
A significant portion of recent improvements in air quality in India resulted from favorable meteorological conditions that are unlikely to persist as the climate changes, a new study has found.
Earth Sciences
Jul 24, 2024
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1
Generalized additive models (GAMs) are commonly used in ecological research for their ability to model complex nonlinear relationships. However, assessing predictor importance in the presence of concurvity is difficult due ...
Environment
Jul 22, 2024
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41
Switching from a gas stove to an electric induction stove can reduce indoor nitrogen dioxide air pollution, a known health hazard, by more than 50 percent according to new research led by scientists at Columbia University ...
Environment
Jul 22, 2024
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30
When summer arrives in the UK, it seems to appear suddenly. One day we can be wrapped up cozy winter woolies—the next we are panic buying fans and ice lollies.
Plants & Animals
Jul 18, 2024
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16
Industrialized farming is often thought to reduce the risk of zoonotic diseases (those transmitted from animals to humans) because of better control, biosecurity and separation of livestock.
Agriculture
Jul 16, 2024
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46
In the wake of the 2020 COVID-19 lockdowns, researchers in northern Italy noticed that notwithstanding the partial suspension of travel and industrial production in the region, the level of particulate matter in the atmosphere ...
Environment
Jul 16, 2024
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2
A research team from the Center of Applied Space Technology and Microgravity (ZARM) at the University of Bremen has investigated the risk of fire on spacecraft in a recent study. The results show that fires on planned exploration ...
Space Exploration
Jul 16, 2024
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1
You can think of our atmosphere as a big chemistry set, a global churn of gaseous molecules and particles that constantly bounce off and change each other in complicated ways. While the particles are very small, often less ...
Environment
Jul 12, 2024
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208
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
