This eco-documentary on global warming shows how we humans are killing off our host, but rest assured there is little political propagandizing. The focus is the cultural moment; humanity — the final global wastage — is no match for evolution, a concept much older than iPods or aqueducts. Through a collection of dialogues with scientists and experts (Stephen Hawking, Mikhail Gorbachev), this film links waste, consumption, and the madness of conventional economics. When humans aim to possess the world, we ruin it, and in the last moment at which change is possible, the human mind — that has both liberated and encaged us — must redefine its desires and shake its culture to the core. Rudimentary bar charts and nature montages aside, this film asks all the right questions without the inconvenient gloss. With Leonardo DiCaprio as narrator, his eyes squinting from glacial glare, we see the wreckage we have created, and the dysfunctional relationship between man and wild.