请用英语评论一部电影

An Inconvenient Truth explores data and predictions regarding climate change, interspersed with personal events from the life of Al Gore. Through a Keynote presentation (dubbed "the slide show") that he has presented worldwide, Gore reviews the scientific evidence for global warming, discusses the politics and economics of global warming, and describes the consequences he believes global climate change will produce if the amount of human-generated greenhouse gases is not significantly reduced in the very near future.

The film includes many segments intended to refute critics who say that global warming is insignificant or unproven. For example, Gore discusses the risk of the collapse of a major ice sheet in Greenland or West Antarctica, either of which could raise global sea levels by approximately 20 feet (6m), flooding coastal areas and producing 100 million refugees. Meltwater from Greenland, because of its lower salinity, could halt the Gulf Stream current a