Monday, May 26, 2008

Dept of Energy: CO2 Emissions Rose in 2007

The U.S. Energy Information Administration (part of the Department of Energy) has found that carbon dioxide emissions (CO2) emissions in the U.S. from burning fossil fuels increased by 1.6 percent last year. The preliminary report found that the causes include weather conditions that drove a higher demand for heating/cooling and a higher carbon intensity of electricity supply.

Other findings (from the news release):
  • CO2 emissions from residential and commercial sectors increased by 4.4 percent and 4.3 percent respectively, as heating degree-days rose by 6.7 percent and cooling degree-days rose by 2.6 percent.
  • Industrial CO2 emissions fell by 0.1 percent, continuing a trend of falling emissions since 2004.
  • Transportation-related emissions, which account for about a third of total energy-related CO2 emissions, increased by 0.1 percent.
  • With combined industrial and transportation emissions essentially flat, all the growth in emissions came from the residential and commercial sectors.
  • When electric power sector emissions are considered as a whole rather than being attributed to the end-use sectors that consume electricity, they are the largest single source of U.S. carbon dioxide emissions, representing 40 percent of total emissions. In 2007, emissions from the electric power sector increased by about 71 MMTCO2 or 3 percent, while power generation increased by 2.5 percent. The increase in the emissions intensity of generation of 0.5 percent reflects, among other factors, a decline in non-fossil-fueled generation, as increased generation from wind and nuclear power of 6 and 19 billion kilowatthours, respectively, did not offset a drop in hydro-generation of 40 billion kilowatthours (kWh).

A full report on all global warming emissions in 2007 will be issued in November 2008.

2 comments:

qtsoul said...

The government should really take this seriously, co2 emissions not only affect the weather but also our health. People should take responsibly in doing their part. GO GREEN!

MB said...

I've just been checking the degree days for a few major US cities at Degree Days.net. Indeed there were more degree days in 2007 than in 2006.

But I'm always sceptical when degree days are used to explain changes in energy consumption. It's very easy to choose a calculation process and figures to support whatever it is you want to show (typically justification for an increase in energy consumption). It's less common for degree days to be used to explain a reduction in energy consumption!