New Delhi: The concentration of toxic gas, SO2, in India’s atmosphere has steadily declined in the past decade due to environmental regulation and control technologies, a study has found. A team of researchers from the Indian Institute of Technology (IIT), Kharagpur, found that SO2 was mainly emitted by coal-fuelled power plants, and other manufacturing and concentration industries. The scientists, led by Jayanarayanan Kuttippurath, monitored the sulphur dioxide concentration for over four decades. Their findings were published in June 2022, in a study titled, ‘Improvements in SO2 pollution in India: role of technology and environmental regulations.’ The study highlighted that a…