Its world premiere was at the 2007 60th Annual Cannes Film Festival (May 16–27, 2007) and it was released on August 17, 2007, in the year in which the Fourth Assessment Report of the United Nations global warming panel IPCC was published and about a year after Al Gore's An Inconvenient Truth, another film documentary about global warming.
Penayangan perdana dunianya diadakan di Festival Film Cannes tahunan ke-60 pada 2007 (16–27 Mei 2007) dan film tersebut dirilis pada 17 Agustus 2007, tahun di mana Laporan Penilaian Keempat dari panel pemanasan global Perserikatan Bangsa-Bangsa IPCC diterbitkan dan sekitar setahun setelah An Inconvenient Truth karya Al Gore, film dokumenter lainnya tentang pemanasan global.