In one study, the United States, published on Monday, said that the smoke emissions in an economically fast developing countries in Asia are more responsible for stopping global warming since 1998. The cooling effect is caused by emissions of sulfur, despite the fact that greenhouse gas emissions have skyrocketed.
The study raised the chance to slow down the process of climate change as soon as possible, otherwise the developing economies will eventually collapse because of the pollution.
As various data, global temperature has not increased from 1998 to 2008, while the man-made emissions of carbon dioxide from burning fossil fuels have increased by about a third.
Researchers from Boston and Harvard Universities, and the University of Turku in Finland, argue that the pollution, especially sulfur emissions due to increased consumption of fossil coal in Asia are responsible for the cooling effect.
Sulfur can form water droplets or water vapor, forming a hazy clouds which reflect sunlight back into space.
"The influence of human activities on the heating and cooling of the Earth's surface over the place waned after 1998, and natural factors have played a significant role", — stated in the report.
Among the factors mentioned natural cooling cycle low solar activity observed after 2002, meaning that Solar radiation is also reduced.
The report said that stopping the warming has caused a lot of doubts about anthropogenic climate change, namely, that man-made emissions of greenhouse gases heat the Earth.
"It is still unclear why the surface temperature did not rise from 1998 to 2008," — said in a report published in the Proceedings of the National Academy of Sciences of the United States of America.
See also: The heat on the eve of the global chill
Maximum temperatures in 1998 coincided with a climatic phenomenon El Niño weather phenomenon which brings warm water to the surface of the Pacific Ocean every few years.
Subsequent years also marked as nine of the ten hottest years, while the World Meteorological Organization, the UN says 2010 also was a record.
Group at the United Nations climate scientists says that in 2007, the belief that the warming was human activity was 90 per cent.
Sulfur particles may be in the atmosphere for several years. This means that a decrease in industrial emissions of their cooling effect will gradually weaken.
The study repeats a similar explanation for the stop warming between 1940 and 1970, when the Western economies has been responsible for the emissions of sulfur, and then in the fight against acid rain, they began to reduce emissions.
"The period of warming following the year 1970 and plays a significant role in increasing the surface temperature of the Earth from the mid 20th century, was marked by efforts to reduce air pollution", — the report says.
According to the energy company BP, sulfur emissions associated with the consumption of coal, which in China has increased by more than 100 percent from 1998 to 2008, or nearly three times as compared with the previous 10 years.
Other climate scientists broadly supported by a study published on Monday, stressing that the long-term increase in carbon dioxide emissions will prevail over the natural cooling factors.
"The long period of warming will continue, despite the fact that emissions have decreased," — said Peter Scott, director of the meteorological center in Britain.