气候学家谈论哥本哈根大会

TONY JONES: But why do you think there's been a revival of scepticism against the science? You must have been disturbed yourself recently by the leaked email exchanges between your fellow scientists at Britain's climate research unit.

Now sceptics are using these emails to support their case that scientists are trying to hoodwink us, that scientists are falsifying data or hiding away evidence that disproves their arguments.

JAMES HANSEN: Yeah, these are very desperate efforts by the contrarians and those who are supporting the business community that wants to continue business as usual. But, you know, the data that is used to determine the temperature change over the last century or so, that data is available to everybody.

If there was anything wrong with the analyses that showed the magnitude of this warming, don't you think that these contrarians would quickly show, do their own analysis and show that there really wasn't any warming? Of course not because they know very well.

You know, they've tried to examine or data and they did find one flaw, which turned out to be 3/100ths of a degree and was an easily explained mistake, but that's the kind of thing, they're looking for nitpicking. They try to find small things and then they question the integrity of the scientists.

But in fact, there's the evidence for climate change, and the analyses is very strong. It's true that in some of these email exchanges that some of the scientists did some things which I think they probably regret.

For example, we should always make our input data available to the community, to anybody, so that they can check our analysis. But, in fact, we've been doing that for many years, and as I say, nobody can find anything that disproves proves our analysis.