President George W. Bush has changed his tune on global warming, but his comments Wednesday calling for a cut in greenhouse gases offered little in the way of specifics, so it's hard to tell how it might affect trucking.

In a speech from the White House Rose Garden Wednesday afternoon, Bush set a goal for the U.S. to stop the growth of greenhouse gas emissions by 2025.
"It is now time for the U.S. to look beyond 2012 and take the next step," Bush said, referring to the expiration of the 1997 Kyoto Protocol, which Bush called a "flawed approach" to dealing with climate change.
The speech is a change for Bush in that it acknowledges the need to deal with greenhouse gases. However, he offered very little in the way of specific proposals in how to meet his announced goal, saying it will depend on accelerating technological development.
He said he did not want to see plans that would raise taxes, impose trade barriers, penalize the use of coal or nuclear power, or do anything that could hurt the economy.
Democrats and environmental groups said the president's goals don't go far enough. The Senate is already considering a bill that would cut greenhouse gases 63 percent by 2050, mostly through pollution limits on utilities and large manufacturers.
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