India plans to spray water from a height of 100 m. on its capital, to try to alleviate the toxic cloud that has triggered an emergency due to pollution in the last 4 days (the cessation of construction activities was decreed, schools were closed, traffic was restricted …). Delhi is one of the most polluted cities in the world (it was the first in 2014), it has 22 mill. of inhabitants and 9 mill. of registered vehicles. The measurement of particles in the air (PM 2.5) yielded a reading of 523 today. The limit of “good air” is 50.

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