AP Sen. John McCain, R-Ariz., left, and Sen. Barack Obama, D-Ill. greet on Capitol Hill in Washington, Tuesday, Jan. 30, 2007, prior to testifying before the Senate Environment and Public Works Committee a hearing on global warming.

Yes, according to advocacy groups testifying Tuesday at the Democrats' first investigative hearing since taking control of Congress.

The hearing focused on allegations that the White House for years has micromanaged the government's climate programs and has closely controlled what scientists have been allowed to tell the public.

QUOTE

"It appears there may have been an orchestrated campaign to mislead the public about climate change," said Rep. Henry Waxman, D-Calif. Waxman is chairman of the Oversight and Government Reform Committee and a critic of the Bush administration's environmental policies, including its views on climate.

SURVEY

At the House hearing, two private advocacy groups produced a survey of 279 government climate scientists showing that many of them say they have been subjected to political pressure aimed at downplaying the climate threat. Their complaints ranged from a challenge to using the phrase "global warming" to raising uncertainty on issues on which most scientists basically agree, to keeping scientists from talking to the media.

WHAT THE SCIENTISTS SAID

The survey and separate interviews with scientists "has brought to light numerous ways in which U.S. federal climate science has been filtered, suppressed and manipulated in the last five years," Francesca Grifo, a senior scientist at the Union of Concerned Scientists, told the committee.

Grifo's group, along with the Government Accountability Project, which helps whistle-blowers, produced the report.

Drew Shindell, a climate scientist with NASA's Goddard Institute for Space Studies, said that climate scientists frequently have been dissuaded from talking to the media about their research, though NASA's restrictions have been eased.

WHO DIDN'T TESTIFY?

Administration officials were not called to testify. In the past the White House has said it has only sought to inject balance into reports on climate change. President Bush has acknowledged concerns about global warming, but he strongly opposes mandatory caps of greenhouse gas emissions, arguing that approach would be too costly.

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