If your head isn’t lodged in the sand, much of what’s said in the movie will be agonizing and familiar. Gasping children, disappearing animals, gushing oil, billowing smoke, dying lakes, emptying forests, warming weather — the list of ills is numbingly familiar. In the movie’s eye-catching opener, the directors riffle through a veritable catalog of timely snapshots, some obvious (a smoggy skyline), others less so (a human fetus).

Effectively blunt, this sequence provoked a colleague to invoke the name of the avant-garde giant Stan Brakhage, but the truer visual and structural model here is a film like “Koyaanisqatsi,” with its streaming global landscapes. The difference is that the images in “The 11th Hour” are pointedly horrifying, not reassuring, pacific or aestheticized.

That can make it tough to watch, which the directors clearly know. They whip through the pictures and the interviews fast — at times a little too fast — and keep the information flowing as quickly as the visuals. This swift, steady pace means that you receive a lot of bad news from a lot of different sources. The ecologist Brock Dolman explains, “When we started feeding off the fossil fuel cycle, we began living with a death-based cycle.” From there the topic nimbly jumps to climate change, national security (courtesy the former director of the C.I.A., R. James Woolsey), Katrina, asthma and the stunning news from the oceanographer and author Sylvia Earle that “we’ve lost 90 percent of most of the big fish in the sea.”

Yes, it’s bad, but it’s not over yet. Many of those same sober talking heads also argue with equal passion that we can save ourselves, along with the sky above us and the earth below. The capacity for human beings to fight, to rise to the occasion, as Mr. Woolsey notes, invoking America’s rapid, albeit delayed jump into World War II, gives hope where none might seem possible.

It is our astonishing capacity for hope that distinguishes “The 11th Hour” and that speaks so powerfully, in part because it is this all-too-human quality that may finally force us to fight the good fight against the damage we have done and continue to do. As the saying goes, keep hope alive — and if you’re holding this review in your hands, don’t forget to recycle the paper.

“The 11th Hour” is rated PG (Parental guidance suggested). It has freakily scary environmental images.

THE 11TH HOUR

Opens today in New York and Los Angeles.

Written and directed by Leila Conners Petersen and Nadia Conners; narrated by Leonardo DiCaprio; directors of photography, Peter Youngblood Hills and Andrew Rowlands; edited by Pietro Scalia and Luis Alvarez y Alvarez; music by Jean-Pascal Beintus and Eric Avery; production designer, Ms. Conners; produced by Mr. DiCaprio, Ms. Petersen, Chuck Castleberry and Brian Gerber; released by Warner Independent Pictures. Running time: 91 minutes.