In the first few minutes of Kalki 2898 AD (2024), a multi-starrer sci-fi drama, there’s one character that speaks the most—and yet doesn’t speak at all—nature. In the second scene, a giant foot crushes a tiny flower on a battlefield. Ashwatthama’s (Amitabh Bachchan) centuries-long curse can only end in Kali Yuga, when “the air will be filled with poison” and “the Ganga devoid of water”. Cut to 2898, Kashi, the world’s last city, where water is so scarce that an old man wonders, “Did the Ganga dry up, washing away our sins?” Let alone water, even the sun barely shines here, and the toxic air compels people to use oxygen masks. Resembling an industrial junkyard, this world can only provide temporal solace—that it’s set in a faraway future—but its alarm bells have been ringing in our own backyards for quite some time. So if a film wants to foreground climate change, then it shouldn’t be sci-fi but ‘cli-fi’.