美國前副總統高爾傾力打造，氣候變遷相關題材中最廣為人知的紀錄片，勇奪奧斯卡最佳紀錄長片及最佳原創歌曲獎，揭露關於全球暖化的真相。高爾離開白宮要職後，走訪世界各地針對全球暖化展開一系列的演講，若人類再不改變現狀，未來全球將飽受氣候變遷相關災害之苦。本片透過高爾的演講，喚起大眾對於環境保護的關注，鼓勵每個人採取行動。

The Cold War's wildest dreams of climate control have made a spectacular comeback: from the USA to China, 'geo-engineers' promise to make climate change the way we want. And they have found powerful supporters among lobbyists and entrepreneurs. This film is an investigation into the world-wide boom in geo-engineering. How did a pseudo-science with a controversial past become a planet-wide research subject?