India, May 9 -- Some Indian cities are often found more choking than any other place in the world. The air quality breaches the acceptable limits of hazardous matters too frequently.

What leaves large swathes of urban India gasping for breath? There are multiple factors, but commercial vehicles are perhaps the most persistent contributors to the high levels of particulate matter in the air. Policy responses like Delhi's odd-even scheme or the National Clean Air Programme (NCAP) have been quick but secured very little success. The suffering of urbanites refused to relent.

For Saurav Kumar, this wasn't an abstract problem. It gave the ignition to the making of Euler Motors with the aim of electrifying India's commercial mobility backbone....