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EPA Releases Draft 2007 Greenhouse Gas Inventory; Transportation Largest End-Use Sector

20 February 2007

Epa07ghg1
US end-use sector emissions of greenhouse gases. Click to enlarge.

The transportation sector in the US accounts for approximately 33% of total greenhouse gas emissions from fossil-fuel combustion, and again represents the largest share of any end-use economic sector, according to a just-published draft of the US Greenhouse Gas Inventory by the Environmental Protection Agency (EPA). (End-use sectors are transportation, industrial, commercial and residential.)

In 2005, total US greenhouse gas emissions were 7,262.3 teragrams of carbon dioxide equivalents. Overall, total US emissions have risen by 16.3% from 1990 to 2005, while the US gross domestic product has increased by 55% over the same period.

According to EPA’s allocations, transportation accounted for 1,899.5 Tg CO2 (in CO2 equivalents) in 2005 out of a total 5,752.8 Tg CO2 generated by fossil fuel combustion. Between 1990 and 2005, transportation CO2 emissions increased by 432.5 Tg CO2, representing approximately 41% of the growth in energy-related CO2 emissions from all sectors.

Within the transportation sector, CO2 emissions increased by 29% from 1990 to 2005, representing an average annual increase of 1.8%. Between 2004 and 2005 transportation CO2 emissions increased by 1.6%. Almost all of the energy consumed in the transportation sector was petroleum-based, including motor gasoline, diesel fuel, jet fuel, and residual oil.

Automobiles and light-duty trucks accounted for approximately 61% of transportation CO2 emissions in 2005, down slightly from 63% in 1990. From 1990 to 2005, CO2 emissions from automobiles and light-duty trucks increased roughly 25% (236.2 Tg CO2). Over this period, vehicle miles traveled (VMT) by automobile and light-duty trucks increased by 39%, outweighing a small increase in overall fleet fuel economy that resulted from the retirement of older vehicles.

Carbon dioxide emissions from freight trucks increased by 69% (157.7 Tg) from 1990 to 2005, representing the largest emissions rate increase of any major transportation mode. Truck VMT increased by 51%.

While CO2 emissions from commercial aircraft grew by approximately 16% (21.8 Tg CO2) from 1990 to 2005, passenger miles traveled (PMT) increased by 69% over the same period, reflecting improvements in the fuel efficiency of planes and an increasing percentage of occupied seats per plane.

The EPA has made the draft of the Inventory of US Greenhouse Gas Emissions and Sinks 1990 - 2005 available for public comment.

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February 20, 2007 in Climate Change | Permalink | Comments (36) | TrackBack (0)

Comments

Ed:

Actually, Texas is currently the leader in the growth in wind power right now. Why? Partly because of the way California's state bureaucracy works (or rather, doesn't work). In order to get approval for any project you need to go to two separate agencies. Details in this article.

"Despite good intentions, the result is that renewable-power projects take several years to complete in California. Compare California's 241 new megawatts of renewable power to Texas' more than 2,200 megawatts of wind energy since it adapted renewable targets in 1999."

This I think is part of the real problem:

"Texas' legislation enacting the renewable requirement was 10 paragraphs long. California's legislation was 13 pages."

Funny how the bluest of blue states is getting its clock cleaned in wind power by the reddest.

Posted by: Cervus | February 21, 2007 at 06:54 PM

Great news! Texas as a state is ranked second behind North Dakota for wind energy potential. Their capacity is an order of magnitude larger than California's however, and their production is 2% higher so relatively speaking, there is little clock cleaning going on.

"Texas’s cumulative total now stands at 2,370 MW of capacity—enough to power over 600,000 average American homes—followed by California’s 2,323 MW. Texas edged ahead of California by adding a total of 375 MW, about half of the total amount installed in the country since the beginning of the year."

AWEA News Room release July 25, 2006

I do agree that wind could be "streamlined" in the top potential states. Namely North and South Dakota, Kansas, Montana, Nebraska and Texas. But lets be realistic, property in California is quite a bit more valuable than in the states listed above.

Posted by: ed | February 21, 2007 at 08:10 PM

Ed:

Read this. Especially look up the Horse Hollow wind farm, which is the largest in the world with about 700MW of installed capacity. As of last December, Texas has 2378MW of installed wind power and another 1100MW under construction. Here's California by comparison. 2361 MW installed capacity, 565MW planned.

Renewable energy enjoys huge bipartisan support in California. But our bureaucracy strangles it.

Posted by: Cervus | February 21, 2007 at 08:53 PM

Correction. Texas has 2768 MW

Posted by: Cervus | February 21, 2007 at 08:55 PM

Wind power is stopped by NIMBY liberals, like Teddy. The early wind generators were too small and too costly to maintain, but the new large ones (.5 to 1 MW)make sense. They are not cheap, since the capacity factor is only about 25% due to the varible nature of wind, but even if their installed cost per realized MWh is twice as high as nuclear, they do not produce a long term storage issue. We should be building wind farms as a component of the war on terror, yet nothing is being done.

Posted by: Van | February 22, 2007 at 07:20 AM

Cervus, the 65% or so ghg reductions I listed were the result technologies and will continue every year as long as that technology is still working. I spent lunch yesterday trying to find some good data on wind power share of ghg reductions. The best I could do is find that total renewable energy contribution was less than 6% most of which is burning biomass.

When the wind and solar industries start providing data on how much electricity is produced instead of how is capacity is built. In any case, windmills are being erected as fast as they can be built. I am not sure what Van wants. Why promote something that does not need promoting? Bush is not promoting windmills as a solution, because he was very successful at that. As president, Bush is promoting nuclear and improving coal efficiency to reduce ghg for making electricity.

Ed is upset because I suggested "Improving gas millage is a 0% solution” when “ This blog is largely based on the fact that improving gas mileage is the BEST solution.” Well the fact is that it was a less than 1.0 % solution in 2005. This is not as bad as it sounds. Most of the mileage improvements were made before 1990 when started counting ghg. It is a case of diminishing returns. Many of the greencar solutions will actually increase ghg while reducing other more important environment impacts.

Posted by: Kit P. | February 23, 2007 at 08:11 AM

Allow me to wade through the BS here and clarify a couple of undisputable FACTS: 1) Improved fuel economy = less fossil fuel consumed/burned = less GHG/pollution/smog (CO2, NOx, etc.) 2)Improved fuel economy = less fossil fuel consumed/burned = less reliance/funding on/of OPEC nations = improved homeland security. These are non-partisan issues and I will not waste any more of my time explaining it to you Kit, we (Detroit) should be beyond this and making it happen.

Posted by: ed | February 23, 2007 at 03:02 PM

what the bozo techies cannot admit is that the solution is to consume less, much, much less, 5-10 times less;so, where's the tech for that ?

Posted by: socrates | February 25, 2007 at 05:08 PM

Socrates, that is easy. I will be happy to help you cut back. Hope you like beans and rice and cold showers. Just as I do not think improving mileage a small amount will reduce ghg, conservation has not been very effective. In a national emergency, rationing has worked.

Posted by: Kit P. | February 25, 2007 at 06:06 PM

There are many ways to reduce your personal consumption as well as there are many ways to reduce consumption on a national or global scale, it can be via technology for example energy efficient light bulbs, or solar pannalling, wind mills instead of hydro which last longer, water reharvesting. All of these examples would be good for the environment obviously, good for the wallet/personal pocket as they save your money, and great for the economy as they require advertising and development. just a thought.,

Posted by: alena dervisevic | June 08, 2007 at 05:37 PM

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