"Meteorological conditions have been extremely unfavourable in September and October this year as compared to the corresponding period last year," Gargava said.
The average ventilation index has been 1,334 metre square per second in September and October this year as compared to 1,850 metre square per second during the corresponding period last year, the official said.
Ventilation index is the speed at which pollutants can get dispersed. A ventilation index lower than 6,000 sqm/second, with average wind speed less than 10 kmph, is unfavourable for dispersal of pollutants.
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)
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