Washington ? The White House today will issue a revised 10-year global warming research plan that sets five goals, chief among them identifying “natural variability” in climate change, an effort that environmentalists say diverts the focus away from man-made pollution.

The second goal listed by the Bush administration is to find better ways of measuring climate effects from burning fossil fuels, industrial production of warming gases and changes in land use. The 364-page plan emphasizes the difficulties but also the importance of reaching that goal.

“These changes have several important climate effects, some of which can be quantified only poorly at present,” say summaries obtained by The Associated Press. Managing the potential human contributions to global warming is described as “a capstone issue for our generation and those to follow.”

Other goals of the plan are to reduce the uncertainty in climate forecasting; to better understand how changes in climate affect human, wildlife and plant communities; and to find more exact ways of calculating the risks of global warming.

The administration also will ask Congress for a new $103 million, two-year initiative to speed up “high priority” research on carbon pollution, aerosols and oceans and determine the best ways to compile and disseminate information about them, Assistant Commerce Secretary James Mahoney told the AP.

He said that effort would be included in President Bush’s budget proposals for 2005 and 2006 and would draw some of its funds from the existing $1.75 billion Climate Change Science Program.

Carbon dioxide from burning oil and coal is blamed by many scientists for contributing to a “greenhouse” or warming effect on global climates.

The Bush administration is the first to comply with Congress’ 1990 mandate that a 10-year climate change research plan be created. Lawmakers also said such a plan should be updated every three years.

The new plan revises a draft released late last year that focused on making better economic projections of possible climate policy changes and tighter coordination of more than a dozen federal agencies’ efforts.

Lester Brown, founder of the Earth Policy Institute, and Philip Clapp, president of National Environmental Trust, criticized the administration for focusing on natural causes of global warming and reopening scientific issues already adequately addressed by the academy and the United Nations’ scientific panel.

“It seems to me that it’s an effort to postpone doing anything meaningful on the climate issue,” said Brown, who called for more research on climate warming effects on crop production and water shortages.