Addressing 14 modifiable risk factors, starting in childhood and continuing throughout life, could prevent or delay nearly half of dementia cases, according to a new report led by UCL researchers.
Aug 3, 2024
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Addressing 14 modifiable risk factors, starting in childhood and continuing throughout life, could prevent or delay nearly half of dementia cases, even as people around the world live longer and the number of people with ...
Jul 31, 2024
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As kids and teens prepare to head back to school, parents might not have protecting their child's lung health on the top of their to-do lists. But experts say it should be.
Aug 4, 2024
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The wildfires that are increasing with climate change could harm the future brain health of humanity, a new study suggests.
Aug 1, 2024
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Millions of cases of dementia could be prevented or delayed by reducing a range of risk factors such as smoking or air pollution, according to a major new study, though outside experts warn that such measures can only go ...
Aug 1, 2024
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Outdoor air pollution was estimated to cause 4.2 million premature deaths worldwide per year as of 2019. This is largely due to exposure to particulate matter (PM), a combination of tiny solid particles and liquid droplets ...
Jul 30, 2024
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Thunderstorms are among the severe weather events increasing in intensity and frequency due to climate change, with direct impacts on public health.
Jul 31, 2024
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We now have a dizzying array of heating technologies to consider, besides the fire that warmed our ancestors.
Aug 1, 2024
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Policy reform is urgently needed to assist older adults who live in southern U.S. cities and who experience higher-than-expected heat-related health issues if they don't have adequate access to air conditioning, according ...
Jul 30, 2024
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Canadian and California wildfires are generating a lot of smoke, which is causing air quality issues in some places.
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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
