B2 High-Intermediate US 4402 Folder Collection
After playing the video, you can click or select the word to look it up in the dictionary.
Report Subtitle Errors
This is an aerosol particle.
In real life, you could barely see it.
It's just a little speck suspended in the atmosphere anywhere from a few days to several years.
It could be dust from a desert.
Or salt from ocean spray.
It could have been blasted out of a volcano.
Or created during a forest fire.
It might have flown out of a factory smokestack.
Or a truck's tailpipe.
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?
Yep, it contains aerosol particles.
They're tiny.
They're powerful.
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!
    You must  Log in  to get the function.
Tip: Click on the article or the word in the subtitle to get translation quickly!



NASA's Earth Minute: My Name is Aerosol

4402 Folder Collection
eunice4u4u published on February 12, 2020    Seraya translated    adam reviewed
More Recommended Videos
  1. 1. Search word

    Select word on the caption to look it up in the dictionary!

  2. 2. Repeat single sentence

    Repeat the same sentence to enhance listening ability

  3. 3. Shortcut


  4. 4. Close caption

    Close the English caption

  5. 5. Embed

    Embed the video to your blog

  6. 6. Unfold

    Hide right panel

  1. Listening Quiz

    Listening Quiz!

  1. Click to open your notebook

  1. UrbanDictionary 俚語字典整合查詢。一般字典查詢不到你滿意的解譯,不妨使用「俚語字典」,或許會讓你有滿意的答案喔