Since windmills require expensive backup because, the weather not being perfect, they only work at 25 per cent of their rated capacity, the amount of the officially deadly dangerous CO2 they save may not be much greater than that of gas generators. Gas produces twice as much energy per unit of carbon released.
Of course if either cutting CO2 or economic sanity were considerations we would go for nuclear plants, which can be bought for £800 million per GW but work with minuscule fuel costs and produce no CO2.
However, with the Brazilian economy growing past that of Britain in the past few days I think we must acknowledge that economic sanity has never been a consideration among politicians of any of the main parties.
It would be good to see the Scottish Tories buck that trend but I am not holding my breath.