New Delhi is the world’s most polluted city due to high levels of PM 2.5 caused by coal-fired factories, automobiles, and lack of government regulations. India is home to the top four polluted cities, with air pollution contributing to over seven million deaths worldwide in 2012. Beijing’s air pollution levels are three times lower than New Delhi’s.
New Delhi, India, is the most polluted city in the world, according to 2014 findings from the World Health Organization (WHO). Air pollution is generally measured by concentrations of particulate matter 2.5 (PM 2.5), which refers to matter in the air that is less than 2.5 micrometers in diameter, or the size that is small enough to be ingested deeper into the lungs. May 2014 PM 2.5 readings measured PM concentrations above 350 micrograms per cubic meter of air, making it the worst in the world. This is thought to be due to the high concentration of coal-fired factories, the growing number of automobiles and the lack of government regulations regarding pollutant emissions.
Read more about the most polluted cities:
According to the WHO, air pollution was thought to contribute to the deaths of more than seven million people worldwide in 2012.
While Beijing, China’s air pollution is so bad it can be seen from space, its air pollution levels are three times lower than New Delhi’s.
Apart from New Delhi being the most polluted city, India is also home to the top four polluted cities in the world – Patna, Gwalior and Raipur.
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