Outside Mumbai’s Vashi railway station on most days, groups of young women and men stop passersby and ask rather urgently, “Do you have one minute to talk about the environment?” These members of Greenpeace India often have their invitations turned down politely or irritably but, at times, some respond with equal earnestness. Shilpi Yadav, a corporate communications professional, was already passionate about green causes and approved of the advocacy group’s daredevil style — its activists all over the world have been known to climb tall structures and unfurl large banners to shame corporations or governments. So Yadav “did not need