Air air pollution in Tamil Nadu steadily declining during the last 5 years, says research

Amongst main cities, particulate matter stage in Chennai has additionally come down, based on CPCB information. 
| Photograph Credit score: S.R. Raghunathan

Tamil Nadu has seen a gentle decline in air air pollution in city and rural areas between 2017 and 2022, a current research has discovered.

The State has recorded a 22% discount in high-quality particulate matter over the five-year interval, noticed Local weather Tendencies, an environmental think-tank. Effective particulate matter is outlined as particles which are 2.5 microns or much less in diameter (PM 2.5).

The research was accomplished by way of two strategies – a satellite-based software by the Indian Institute of Expertise, Delhi and the Central Air pollution Management Board’s (CPCB) floor monitoring networks. In Tamil Nadu’s rural areas, the PM 2.5 stage dropped from 46.6㎍/m3 (microgram per cubic metre) in 2017 to 32.9㎍/m3 in 2022. Whereas in city locations, the PM 2.5 ranges have been 42.7 ㎍/m3 in 2017 and 33.1 ㎍/m3 final yr.

Amongst main cities, Chennai additionally noticed a fall of PM 2.5 ranges from 40.86㎍/m3 in 2017 to twenty-eight.90㎍/m3 in 2022, as per CPCB information.

“The evaluation displays the progress being made underneath the Nationwide Clear Air Programme (NCAP) with most States and Union Territories seeing a dip of their PM 2.5 ranges over the previous few years. When divided into NCAP and non-NCAP States, we see a extra important dip in States the place NCAP is being applied,” stated Aarti Khosla, Director, Local weather Tendencies.

Underneath the NCAP, solely three cities in Tamil Nadu – Chennai, Madurai, and Tuticorin – have been categorised as non-attainment cities.

The research says whereas NCAP was designed to handle excessive ranges of air air pollution in city centres, there is a rise in air pollution in rural areas too. “There may be an pressing want to trace air pollution ranges and develop insurance policies for rural areas, as there may be little distinction in focus ranges between city and rural areas,” it says.

The Tamil Nadu Air pollution Management Board (TNPCB) is within the course of of putting in 25 new air high quality monitoring stations, stated R. Kannan, Member Secretary, TNPCB. The stations could be in district headquarters and cities the place the inhabitants is multiple lakh, he stated.

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