WASHINGTON, March 4 (Reuters) - U.S. oil and natural gas producing companies should not receive federal subsidies in the form of tax breaks because their businesses contribute to global warming, U.S. Treasury Secretary Timothy Geithner told Congress on Wednesday.

It was one of the sharpest attacks yet on the oil and gas industry by a top Obama administration official, reinforcing the White House stance that new U.S. energy policy will focus on promoting renewable energy sources like wind and solar power and rely less on traditional fossil fuels like oil as America tackles climate change.

"We don't believe it makes sense to significantly subsidize the production and use of sources of energy (like oil and gas) that are dramatically going to add to our climate change (problem). We don't think that's good economic policy and we think changing those incentives is good for the country," Geithner told the Senate Finance Committee at a hearing on the White House's proposed budget for the 2010 spending year.