But I've got a soft spot for the Liberal Democrats. For a while now they've been the most left-wing of the three mainstream parties. And now they also seem to be becoming the greenest. At the party conference in Brighton today they will vote on a motion calling for 30% of the UK's electricity to be produced from clean, non-carbon-emitting sources by 2020 - rising to 100% by 2050. The party leader Sir Menzies Campbell said
We should be working towards a carbon-neutral Britain by 2050. We should be working towards the elimination of petrol-driven motor cars.
That's radical stuff, and I was astonished to hear it coming from a mainstream party leader on BBC1 Breakfast. He doesn't mean nuclear power either, although I think there is going to be a heated debate about that, both in Brighton and in the rest of the country in the coming few years.
Cameron loves talking about climate change as well. How long before number 10 starts setting deadlines for a carbon-neutral Britain, and the elimination of petrol-fueled cars?