A landmark new report has found that diesel SUVs on Indian roads are emitting 25 to 65 times as much noxious nitrogen oxide as a small petrol car. These shocking results come from actual on-road testing of Indian cars by two reputed environmental non-profits. A study published earlier this year in Nature magazine estimated that excess nitrogen oxide emissions were linked to 38,000 premature deaths worldwide in 2015 mostly in the EU, China, and India. We ask: is it now imperative to say no to diesel cars?