8.6 million tons of Nitrogen oxides were given off in 1999.
http://iaspub.epa.gov/airsdata/adnet.ranking?geotype=us&geocode=USA&geoinfo=us%7EUSA%7EUnited+States&pol=NOX&year=1999&fld=percent&fld=plt_name&fld=addr&fld=county&fld=state&fld=sic&rpp=25
How much Nitrogen Oxide is given off to make electricity from natural gas and coal?
1 answer