Colorado is part of the RMPA (Rocky Mountain Power Area). It might not top the charts for absolute emissions. A better metric to search for would be emissions p

Colorado is part of the RMPA (Rocky Mountain Power Area). It might not top the charts for absolute emissions. A better metric to search for would be emissions per megawatt hour (lb/MWh). In 2009, RMPA had the highest carbon emissions per megawatt hour out of the entire US, at 1,824.51 lb/MWh [0]. It also emits nitrous oxide at a high rate, though not the highest in the country. [0] http://www2.epa.gov/sites/production/files/2015-02/documents/egrid2012v1_0_year09_summarytables.pdf http://www2.epa.gov/sites/production/files/2015-02/documents...