Industrial energy use is the third largest GHG-emitting sector in the Midwest, accounting for 14 percent of total regional emissions.

Industrial sector emissions declined between 1990 and 2003. The greatest industrial sector emission declines--nearly 10 times greater than the national decline over this time period--occurred in Ohio and Michigan (29 percent and 27 percent, respectively). Meanwhile, industrial emissions in Iowa, Minnesota, and Wisconsin increased during this period by 13, 12, and 9 percent, respectively, countering national and regional trends.

Region-wide, emissions were relatively stable through the 1990s until 1999, when sector emissions began to decline.