NASA | Ozone-rich air descends from on high

The video explains the role of the stratosphere in protecting us from UV rays and how ozone sometimes moves to the lower atmosphere, a phenomenon known as stratospheric intrusion. It discusses the EPA's ozone limits and the implications of exceeding these limits. The video also covers how states can prove that high ozone levels are not due to local pollution, using high-resolution models like Geos 5 to understand atmospheric conditions and predict ozone exceedances.

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