n. A literary or movie genre featuring dystopian stories of Earth affected by extreme climate change.
Cli-fi, or 'climate fiction,' describes a dystopian present, as opposed to a dystopian future. And don't call it 'science fiction.' Cli-fi is literary fiction.
—Husna Haq, “Climate change inspires a new literary genre: cli-fi,” The Christian Science Monitor, April 26, 2013
Odds is the latest in what seems to be an emerging literary genre. Over the past decade, more and more writers have begun to set their novels and short stories in worlds, not unlike our own, where the Earth's systems are noticeably off-kilter. The genre has come to be called climate fiction — "cli-fi," for short.
—Angela Evancie, “So Hot Right Now: Has Climate Change Created A New Literary Genre?,” National Public Radio, April 20, 2013
2011 (earliest)
From "Soylent Green" in 1973 to "The Day After Tomorrow" in 2004, movies also began to venture into a new genre of science fiction that might be called "cli-fi" .. or climate fiction.

Cli-fi is also a new genre for novels and short stories.