Name: NASA's Earth Minute: My Name is Aerosol
Uploaded: 2020-02-12T09:05:32.000Z
Duration: 1 min 44 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

It's just a little speck suspended in the atmosphere anywhere from a few days to several years.

It could have been blasted out of a volcano.

It might have flown out of a factory smokestack.

Depending on what it is—and where it is—an aerosol particle can do some impressive things.

Like cool the planet by reflecting sunlight back into space.

Or by collecting water vapor to build a cloud.

On the other hand, some aerosol particles trap sunlight and heat the air, thus preventing clouds from forming.

Other aerosols can host chemical reactions that damage the ozone layer.

And down on Earth, they can even cause health problems, such as lung and heart disease.

That layer of hazy air pollution above big cities?

NASA studies them with satellites and instruments on the International Space Station, and with specialized aircraft and ground-based devices.

Because when it comes to understanding our environment, our climate, and how it's all changing, little particles make a big difference!

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NASA's Earth Minute: My Name is Aerosol

barely

impressive

disease

climate