DTE Energy - Fuel Mix

The following chart compares the environmental and fuel mix characteristics of Detroit Edison’s electric supply against regional averages for the last year. Detroit Edison continues to increase our energy generated by renewable sources and reduce our emissions.

Fuel Source for the 12-month period Jan. 2010 - Dec. 2010	Detroit Edison's Fuel Mix Used to Supply Electricity	Regional Average Fuel Mix Used to Generate Electricity (MI, IL, IN, OH and WI) Issued Feb. 2011
Coal	77.3%	67.06%
Nuclear	18.6%	24.04%
Gas	2.3%	5.36%
Oil	0.2%	0.43%
Hydroelectric	0.1%	0.57%
Renewable Fuels Total	1.3%	2.54%
Biofuel	0.04%	0.39%
Biomass	0.72%	0.42%
Solar	0.00%	0.01%
Solid Waste Incineration	0.30%	0.00%
Wind	0.23%	1.28%
Wood	0.05%	0.45%

Fossil Plant Emission or Nuclear Plant Waste Jan. 2010 - Dec. 2010	Detroit Edison Average for Fossil/Nuclear Generation	Regional Average for Fossil/Nuclear Generation (MI, IL, IN, OH, and WI)
Sulfur Dioxide	7.1 lbs./MWh	8.21 lbs./MWh
Carbon Dioxide	2,101 lbs./MWh	2,186 lbs./MWh
Nitrogen Oxides	2.2 lbs./MWh	2.01 lbs./MWh

Nuclear Plant Waste Jan. 2010 - Dec. 2010	Detroit Edison Average for Nuclear Generation	Regional Average for Nuclear Generation (MI, IL, IN, OH, and WI)
High-Level Nuclear Waste	.0056 lbs./MWh	.0083 lbs./MWh

Greenhouse Gas Emissions Jan. 2010 - Dec. 2010	Detroit Edison System Average Fossil and Nuclear Generation	2009 Regional Average Fossil & Nuclear Generation (MI, IL, IN, OH, and WI)
Carbon Dioxide	1,772 lbs./MWh	1,608 lbs./MWh

NOTE: Purchased electricity accounted for 12.2% of the electricity supplied by Detroit Edison during the period. The regional average fuel mix is provided by the U.S. Energy Information Administration and is used as a proxy for the actual fuel mix of certain electricity purchased by Detroit Edison because the actual fuel mix characteristics of that purchased electricity could not be discerned.