Chart of the Day – Air Quality

Today’s Charts of the Day concern air quality.

Twin Cities Metropolitan Air Quality - Percent of National Standard

Twin Cities Metropolitan Air Quality – Percent of National Standard

 

Comparison of growth areas and emissions in Minnesota - percent change since 1990.

Comparison of growth areas and emissions in Minnesota – percent change since 1990.

Source: MnDOT  Annual Transportation Performance Report 2012

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One Response to Chart of the Day – Air Quality

  1. Janne Flisrand
    Janne April 15, 2014 at 12:25 pm #

    What’s up with the strange spike of NOx 2004-2006?

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