India has recorded a drop in the emission of sulphur dioxide (SO2) in 2019 compared to 2018 for the first time in 4 years. But, it is still contributing 21% of global anthropogenic emissions of sulphur dioxide, India continues to be at the top in the list of big emitters for the fifth year in a row. India has recorded a 6% decline in the emission of hazardous sulphur dioxide (SO2) in 2019 compared to 2018 - the first decline in four years. But by contributing 21% of global anthropogenic emissions of sulphur dioxide, India continues to be at the top in the list of big emitters for the fifth year in a row. The overall SO2 emissions fell for all the top three big emitters - India, Russia and China - for only the second time on record.