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Air Trends

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Description

The air quality trends summaries are intended to reflect actual air quality and therefore include concentrations that may have been impacted by episodic events like wildfires and dust storms.

Questions this resource can help answer

How has the trend in NO2 concentrations changed since the year 2000?

How do I use this resource?

Determine long-term trends in the national, regional and local concentrations of each of the six criteria air pollutants

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