I went to see An Inconvenient Truth this week. It’s on a short run outside of London making it briefly a slightly more convenient truth. I was rather impressed. There’s little new in the film, at not to those living in Europe, but what is there is put together and presented very well. The film tackles four basic issues, What is Global Warming? What’s causing it? Why does it matter? What can we do about it?
The explanation of Global Warming is simplfied, it solely about CO2 in Al Gore’s film, which skips over the problems that might be caused by things like Methane clathrates. For the sake of explaining the problem this is a very smart move, because it allows him to then concentrate on one issue for tackling the cause. The common rejoinder from industry is that warming and cooling follows a natural cycle. Gore’s able to show that this is true it does. He’s then able to follow this up by showing the range of natural variation, and how modern carbon dioxide levels are way waaaay in excess of natural variation. Some of the more powerful scenes in the film explore why this matters. In the preview above you can see that a feasible rise of sea level caused by the melting of Greenlandic or a portion of Antarctic ice will cause large scale flooding of densely populated coastal areas.
The weakest part of the film, from a European perspective is the call to action. He says nothing wrong, but it’s all very old news over here. This is very much a section for the North American audience where being green is a matter of envying your neighbour’s gas guzzler. One scene is about proposed improvements in fuel efficiency by the state of California which are being opposed by the motor industry and it’s hard not to laugh. They’re pitiful. California wants to be, in twelve year’s time, where China is today. If this really is a problem for Ford or General Motors then who in their right mind would buy an American car?
This aside, it is a very good introduction to the problem. Like all politicians Gore cannot tell jokes, but he comes close on a couple of occasions. What he does do is get across his message clearly, effectively and powerfully. Visual aids are used well, but so is his presence as a speaker. As an example of science communication its hard to beat.