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15,231,994 results
About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure.
12,665,479 views
6 years ago
Air quality is a measure of how clean or polluted the air is. The two main culprits of poor air quality are particulate matter and ...
11,216 views
2 years ago
This three-minute video describes how indoor air quality impacts your lungs, as well as providing practical tips for improving the ...
36,755 views
1 year ago
How to understand the Air Quality Index where you live, explained by Coleman Lowndes. Subscribe to our channel and turn on ...
258,294 views
Air pollution is an invisible killer that lurks all around us, preying on the young and old. Learn how it slips unnoticed past our ...
407,374 views
701,000 views
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9,100 views
49,000 views
70,000 views
38,000 views
198 views
3,400 views
1,600 views
67,000 views
101,000 views
1,100 views
2,700 views
7,700 views
4,500 views
3,300 views
Environment Protection Authority Victoria has been monitoring ambient air quality in Victoria since 1979. In that time, our scientific ...
76,760 views
8 years ago
The alert will last in central and southern Minnesota until noon, though it will lift earlier in the northern part of the state.
4,030 views
1 month ago
As average temperatures rise across the globe, air quality can also change. This video discusses ways that communities can ...
62,681 views
4 years ago
"Every child should be able to breathe clean air." Indoor air pollution is an international health concern because people spend a ...
29,076 views
5 years ago
China has long battled air pollution in its major cities. The air quality was so bad in places like Beijing that residents kept their ...
16,855 views
9 months ago
New York City officials are getting prepared if wildfires once again impact the city's air quality.
29,734 views
12 days ago
NYC officials issued an air quality alert on Tuesday. It was this week last year when smoke from the Canadian wildfires turned the ...
5,576 views
11 days ago
Using new, high-resolution global satellite maps of air quality indicators, NASA scientists tracked air pollution trends over the last ...
207,383 views
As wildfire season continues across many parts of the nation, Colorado's air quality has rapidly deteriorated too. Learn why it's ...
13,531 views
Air – it's all around us.It's what we breathe, and it's vital to our health and well-being. Economic activities, such as transport, ...
23,418 views
The EPA establishes an Air Quality Index for five major air pollutants regulated by the Clean Air Act.
1,406 views
Learn about how indoor air pollutants impact your lungs and what it is important to keep the air in schools clean.
3,651 views
The air quality in West Michigan has been pushed into the "unhealthy" category by wildfire smoke. Here's how you can protect ...
6,210 views
11 months ago
The Washington State Department of Health has a system to determine if air quality poses a health risk. The Air Quality Index ...
6,813 views
The EPA sets air-quality standards to protect the health of the U.S. population. Are current standards stringent enough?
3,517 views