May I suggest that everyone posting here look at the film before posting any more about it?

I was impressed particularly by one figure in the film - the study showing that virtually all peer-reviewed scientific articles warn of catastrophic global warming, while a large proportion of articles in the popular press dismiss the idea.

So scientists, who need to protect their reputation, are warning of the danger, while journalists, who need to protect their advertising revenue, are pooh-poohing it.

One of the greatest dangers is that the Atlantic Conveyor - the current running from Mexico to Greenland and back, salinating the sea, warming it, providing an ecosystem for thousands of marine species - may be destroyed if the tongue of ice near Denmark that spurs it back towards Mexico breaks off.

If this happens, and it's now considered almost certain to happen, very fast we'll have an ice age in the eastern US and northern Europe.

Someone invent an alternative to oil, quick.