Although Beijing has recently attracted international media attention for code red air pollution installed from Tuesday to Thursday, the city is not far from the most polluted in the world.
The air in New Delhi are recorded annually a concentration three times higher than in the Chinese capital, which is not even in the top 50 positions in the ranking conducted by the World Health Organization (WHO), the Hindustan Times cited.
Moreover, during the alert of China in New Delhi, the air was almost twice as dangerous. The concentration of particulate matter PM 2.5 was 230.9 micrograms per cubic meter, nearly two times higher than that recorded in Beijing 139.7 micrograms per cubic meter, according to data from sensor IndiaSpend in Delhi and the US government mounted embassy Beijing.
PM 2.5 particles are 2.5 micrometers in diameter not more than that, inhaled short or long term can lead to worsening asthma or respiratory diseases or even the occurrence of lung cancer.
According to WHO, the air in Delhi records an annual average concentration of PM 2.5 particles of 153 micrograms per cubic meter, nearly three times more than in Beijing, where there is 56 micrograms per cubic meter.
The level of PM 2.5 particles suspended in the air considered safe by the WHO is 25 micrograms per cubic meter.
According to WHO, Delhi is the city that has the most polluted air in the world and Beijing is not even in the top 50 cities in the rankings. Among the top ten cities in the world that have the most polluted air, six are in India, three in Pakistan and one in Iran.
In Delhi, nearly 4.4 million students have serious lung problems in adulthood, according to a report by the Chittaranjan National Cancer Institute.
Beijing decreed code red pollution from Tuesday to Thursday for millions of cars have been forced to stand, building factories and premises were closed, and schools and other public institutions have suspended work.