China today issued a yellow alert for contamination in the north, which is expected to remain until next Tuesday, when a cold front arrives. EFE
Beijing, Tianjin (northern port city) and parts of the provinces of Hebei, Henan and Shandong and Jilin, Liaoning and Heliongjiang (north) these days suffer pollution levels moderate to strong, said the National Meteorological Center of China .
Some cities have passed since the weekend concentration 1,000 micrograms per cubic meter of PM2.5 particles, the smallest and most harmful to health because they can penetrate directly into the lungs, according to official data.
These figures represent a record in the country and are well above the average recommended by the World Health Organization (WHO), 25 micrograms per cubic meter on average in 24 hours.
Pollution, caused in part by the launch of heaters, fueled by burning coal, will go through dispersing a cold front will come from next Tuesday, according to the agency.
Chinese authorities use to warn of pollution on a scale of four colors, in which the red alert is the most serious, followed by orange, yellow and blue.