WASHINGTON — The Bush administration Monday described in its starkest terms the potentially serious consequences of global warming, but it did not call for any stronger efforts to combat the problem than those it has already proposed.
The report, submitted to the United Nations, stated that the climate changes of recent decades "are likely due mostly to human activities." But it projected that the United States, already the world's biggest producer of greenhouse gases, would emit 43% more of such gases in 2020 than in 2000.
Earlier this year, President Bush outlined a policy to prod businesses to reduce greenhouse gas emissions voluntarily. That approach, he said, would slow the growth without damaging the economy. Requiring businesses to reduce greenhouse gas emissions, he said, would hurt the nation's economy.
Experts said Monday's report revealed a glaring mismatch between the administration's own estimate of the scale of the problem and the president's efforts to deal with it.
"I do see a disconnect; there has to be more of an action plan," said UC Irvine Chancellor Ralph J. Cicerone, who headed a recent National Academy of Sciences panel on climate change.
But instead of outlining new goals, the administration defended its current policy in the report, which was required as part of the 1992 U.N. Framework Convention on Climate Change, signed by the president's father.
"What strikes me about this report is that it says that the climate is changing, it's going to have a serious impact on the United States and here's my way of dealing with it: Do nothing," said Eileen Claussen, director of the Pew Center on Global Climate Change, which works with businesses to reduce greenhouse gas emissions. "It is quite amazing."
White House officials disputed the notion that the Bush administration's policy did not jibe with their interpretation of the problem.
"We have always said that climate change is a serious issue," said White House spokesman Scott McClellan. "That's why the president has a plan to address it; that's why we're investing $4.5 billion in the fiscal 2003 budget."
Much of that money will pay for research that will help the administration better understand the challenges ahead.
"It's not a sudden revelation here and it's not a new policy of any kind," said Joe Martyak, Environmental Protection Agency spokesman. "We've always known that man contributed. But there's a lot of uncertainty about just how much comes from the human contributions."
