Black carbon level in city 5 times higher than WHO limits: study
Source: The Hindu, Date: February , 2017
Kochi, Feb 2017:†The
ambient black carbon (BC) concentration in the city has been found to be about
five times higher than the limits set by the World Health Organisation (WHO).
It was found that the city had BC measurement of over 95,000 ng/m3 (nanogram
per cubic metre) whereas the WHO mentions levels of BC not more than 20,000
ng/m3 to be safe. BC is a significant light absorbing particulate matter in the
air formed by the burning of fuels. The BC values were found by Biju Thomas,
paediatric respiratory medicine consultant from Singapore, who undertook a
study to find a personís exposure to black carbon in Kochi.