Impatient with the slow pace of international climate change negotiations, a small group of countries led by the United States is starting a program to reduce emissions of common pollutants that contribute to rapid climate change and widespread health problems.

Secretary of State Hillary Rodham Clinton plans to announce the initiative at the State Department on Thursday accompanied by officials from Bangladesh, Canada, Ghana, Mexico, Sweden and the United Nations Environment Program.

The plan will address short-lived pollutants like soot (also referred to as black carbon), methane and hydrofluorocarbons that have an outsize influence on global warming, accounting for 30 to 40 percent of global warming. Soot from diesel exhausts and the burning of wood, agricultural waste and dung for heating and cooking causes an estimated two million premature deaths a year, particularly in the poorest countries.

Scientists say that concerted action on these substances can reduce global temperatures by 0.5 degrees Celsius by 2050 and prevent millions of cases of lung and heart disease by 2030.

“This is very much in the win-win category good on climate at the same time that it’s good on health, food production and energy, said Todd D. Stern, the State Department’s special envoy for climate change.

“It’s not a negotiation over who takes what targets, he said, “but a voluntary partnership aimed at producing tangible results in a relatively short period of time.

The United States intends to contribute $12 million and Canada $3 million over two years to get the program off the ground and to help recruit other countries to participate. The United Nations Environment Program will run the project.

Officials hope that by tackling these fast-acting, climate-changing agents they can get results quicker than through the laborious and highly political negotiations conducted under the United Nations Framework Convention on Climate Change, or U.N.F.C.C.C. That process, involving more than 190 nations, grinds on year after year with incremental political progress but little real impact on the climate.

At the most recent United Nations climate summit meeting, in Durban, South Africa, negotiators agreed to try to produce a binding global climate change treaty by 2015, to take effect after 2020. Many scientists say that irreversible damage to the atmosphere will be done before then.

2012 The New York Times Company