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I skimmed the newspapers this morning to pick up on any unexpected ‘green vibes’ around the Budget. Every indication is that there isn’t going to be any big “New Deal� brought forward, as part of a larger recovery package, although lots of ‘green lollypops’ will no doubt be there in the shop window.

And almost certainly a number of them will cover transport. A £5,000 subsidy for purchasers of electric cars has been widely flagged plus a few tens of millions to subsidise charging points. Hopefully, we’ll also see some details around the Government’s earlier commitment to promote electric vehicles through the Low Carbon Vehicles Procurement programme.

On the whole, this would be a good thing. The Committee on Climate Change has been very clear in its advice to government that the wholesale electrification of transport (apart from aviation!) is a precondition of meeting our long term targets on CO2 and other greenhouse gases. A lot depends on where that electricity will come from, but its good to see at least one little government toe in the water.

And then there’s the whole debate about a possible scrappage scheme – with motorists getting up to £2000 to hand in their old cars and buy new ones. The Society of Motor Manufacturers and Traders has been lobbying ferociously to get this through, simply as a support mechanism for hard-pressed car companies. (Car sales in March were down 30% on last year). They argue it has worked in January in terms of new car sales, so why shouldn’t it work here?

It might. But there will be zero sustainability benefits arising from such a scheme even if it does. Even if people buy slightly ‘greener’ models, there will still be very high emissions arising because of all the CO2 embedded in the manufacture of those cars. So the cost per tonne per CO2 saved is very high.

Environmentalists have argued that a much better use of taxpayer’s money would be for the Government to support the establishment of low-carbon car clubs – reducing congestion, reducing emissions, and reducing costs for those motorists smart enough to realise they can get almost all the benefits they want from the use of a car, without the hassle of actually owning one.

All of this will be a big test of Darling’s “seriousness of intent�, helping move transport policy just a little bit further down the road to its inevitable low-carbon destination.