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When Moonbat starts to talk sense, step back and wait.
After climategate he did a lot of grovelling hair shirt stuff but it didn't change his stance on AGW one iota. He was just distancing himself from the taint of corrupt science.
If he is making sense here it is because he sees a risk of this sort of blather harming his core objective. It isn't that he has changed his position but is alert to the dangers of over egging by people theoretically on his side of the fence.
In reply to JMW, I think Monbiot is genuinely pro-nuclear nowadays. In case you missed it, he declared his support for nuclear power as an important means of reducing CO2 emissions after the Japanese nuclear accident following the tsunami in March this year. (Monbiot's pro-nuclear declaration was discussed in the 'Earthquake in Japan' thread earlier this year) Since then he's written about half a dozen pro-nuclear power articles in the Guardian.
As I said in the 'Earthquake in Japan' thread I think Monbiot's days as a Guardian environmental journalist are likely to be numbered. He must be the only openly pro-nuclear environmental journalist in Britain, and possibly in the Western world. According to Monbiot's website, where he has adopted the idea of setting up a registery of interests, he has a contract with the Guardian worth £62K a year running up to Jan 31st 2012. Unless he does an about turn in the next two months, I'd be surprised if that contract was renewed, and I would guess that he would become a Mark Lynas style independent environmental writer after that.
I think Monbiot's agenda with the article attacking Chris Busby is that he's trying to marginalise Busby from the rest of the British Green movement. He's trying to portray Busby as just being some sort of 'loose cannon', but I think Busby is actually regarded as a scientific hotshot in British and European Green circles. Busby is the scientific secretary of some European Green group called the 'European Committee on Radiation Risk'. Also it is not definite that Busby is no longer the British Green party's National Speaker on Science and Technology as Monbiot is claiming. After a quick search I can't find out who the current holder of that title is, suggesting Busby may still have it. Busby is a classic example of what I call a Doomwatch-type scientist (after the Brtish TV show of that name in the early 1970s) and the Green movement has taken its scientific advice from these sort of people for forty years.
For anybody wondering about Monbiot's employment status with the Guardian, it turns out that his contract has been renewed. According to his registry of interests ( http://www.monbiot.com/registry-of-interests/ ), he is getting paid £62,007 to supply columns,blog posts and other material to the Guardian from 1st February 2012 to 31st January 2013.
I thought there was a fairly good chance that one of Britain's top promoters of AGW might have got the boot as a result of his pro-nuclear stance, but I suppose it depends who makes the decisions regarding these contracts, it may not be the environment editor.