Andrew Stone speaks to acclaimed environmentalist and Guardian columnist George Monbiot about the threat posed by global warming.
There have been a number of reports in recent weeks on the effects of global warming, including the report from the international conference in Exeter on climate change. What do they add to our knowledge about the scale of the problem?
Well, they reinforce what we were already aware of - that there's an urgent existential problem, in other words, one that threatens the continued existence of human beings on the planet. They have provided some quite specific predictions of what might happen by particular dates, and what the scale of the crisis is that we need to avoid.