According to the Ministry, India’s annual sulphur dioxide concentration standard of 50 microgram/cubic metre is more stringent than Japan (66), European Union (52.4) and Australia (66).
source https://www.thehindu.com/sci-tech/energy-and-environment/environment-ministry-defends-new-coal-plant-norms-as-cost-effective-climate-coherent/article69811706.ece
source https://www.thehindu.com/sci-tech/energy-and-environment/environment-ministry-defends-new-coal-plant-norms-as-cost-effective-climate-coherent/article69811706.ece