The 11th Hour lays out the case that human activity has pushed the planet's ecological systems toward collapse, and asks what happens next. Narrated and co-produced by Leonardo DiCaprio, the film assembles more than fifty scientists, politicians, and environmental thinkers, including Mikhail Gorbachev and physicist Stephen Hawking, to walk through deforestation, species loss, melting ice, and the carbon cycle. Archival footage of industrial expansion sits alongside present-day scenes of clear-cut forests and bleached reefs, building a chronology of how quickly the changes have accelerated since the mid-twentieth century. Rather than stopping at the diagnosis, the film spends its second half on people already redesigning cities, buildings, and farming systems around ecological limits, treating those experiments as evidence that a different path is technically possible. The interviews range from climatologists to architects to indigenous voices, giving the argument more range than a single talking head could. It closes on the film's actual stakes: whether industrial civilization can redesign itself fast enough to matter.