The smoke emitted into the atmosphere from rapidly growing Asian economies is largely responsible for a slowdown in global warming in the decade after 1998 due to the cooling effect of sulfur, although emissions of greenhouse gases are fired, said Monday a U.S. study.
The report raised the possibility that climate change will accelerate with emerging economies to take action against pollution.
Global temperatures did not grow between 1998 and 2008, although carbon dioxide emissions caused by humans burning fossil fuels increased almost threefold, according to various data.
Researchers from the universities of Boston and Harvard and the University of Turku Finland reported that Asian pollution, particularly sulfur emissions from burning coal, were responsible for a cooling effect.
The sulfide can be formed of water droplets or aerosols, create clouds that reflect sunlight back into space.
"Anthropogenic activities that heat and cool the planet is largely canceled after 1998, allowing the natural variables play a significant role," the text of the study.
The cooling effects of solar cycle included a decline after , meaning that the solar emissions were reduced.
The study indicates that the brake on the warming had raised doubts about anthropogenic climate change, which scientists say emissions of greenhouse gases caused by human activity are warming the Earth
"There has not been clear why the surface temperature of the planet grew between 1998 and 2008," said the report, published in the journal Proceedings of the National Academy of Sciences of the USA.
A spike in temperatures in 1998 coincided with a strong El Nino weather phenomenon, a natural change that leads to the surface warm waters of the Pacific Ocean every few years.
The following years have included nine of the 10 warmest years on record, although the UN World Meteorological Organization said that 2010 had tied the record year.
A panel of UN scientists said in 2007 that was 90 percent certain that mankind causes global warming.
The sulfur aerosols in the atmosphere can remain for several years, so their cooling effect gradually disappear once the old industries transform enveloped in smoke.
The study coincided with a similar explanation for the reduction of heating between 40 and 70, attributed to sulfur emissions before they leave the western economies this pollution, largely to combat acid rain.
"The era of post-1970 warming, which poses a significant portion of the increase in global surface temperature since the mid-twentieth century, driven by efforts to reduce air pollution," he said.
Sulfur emissions have been linked with the consumption of coal in China increased by over 100 percent in the decade of 2008, or nearly three times the pace of the previous 10 years, according to energy firm BP.
Other climate scientists and a majority supported the study on Monday, noting that over longer periods of time, emissions of greenhouse gases outweigh the chill.
"The long-term warming will continue unless emissions are reduced," said Peter Stott, head of climate monitoring at the British Meteorological Office.