It all started, he tells his audience, when one of his professors at Harvard University, Roger Revelle, presented in class the now iconic serrated curve describing the concentration of atmospheric CO 2 over time. And Gore is a master of the unsettling plotline. But as the discerning movie buff knows, it all comes down to delivery. The hair-raising message he relates is also beginning to become as clichéd as last year’s favourite psychopath: inhabitants of industrialised nations are collectively destabilising Earth’s climate. Like all effective horror movies, An Inconvenient Truth has a slow build-up in fact, the setting is about as banal as it gets: a public lecture given by a well-known member of the political establishment, former US Vice President Al Gore. It is all the more surprising that the most horrific of the current crop of scary movies has recently won an Oscar, not to mention the Nobel Peace Prize awarded to its main protagonist. Horror movies are a popular, albeit rather despised, film genre.

An inconvenient truth dvd