"I can't think of another movie in which the display of a graph elicited gasps of horror, but when the red lines showing the increasing rates of carbon-dioxide emissions and the corresponding rise in temperatures come on screen, the effect is jolting and chilling. Photographs of receding ice fields and glaciers — consequences of climate change that have already taken place — are as disturbing as speculative maps of submerged coastlines. The news of increased hurricane activity and warming oceans is all the more alarming for being delivered in Mr. Gore's matter-of-fact, scholarly tone.
He speaks of the need to reduce carbon-dioxide emissions as a "moral imperative," and most people who see this movie will do so out of a sense of duty, which seems to me entirely appropriate. Luckily, it happens to be a well-made documentary, edited crisply enough to keep it from feeling like 90 minutes of C-Span and shaped to give Mr. Gore's argument a real sense of drama. As unsettling as it can be, it is also intellectually exhilarating, and, like any good piece of pedagogy, whets the appetite for further study. This is not everything you need to know about global warming: that's the point. But it is a good place to start, and to continue, a process of education that could hardly be more urgent. "An Inconvenient Truth" is a necessary film...."
It is an absolutely necessary film, if there ever was one. Or even if there was not. there is now.