I don't think anyone denies that the earths climate is changing, the question some people are asking is how much is man made. The earth's climate was changing way before man arrived on the scene, so how do sandal wearers explain that.
The other point is that with your Chinas and russia's polluting the atmosphere on an idustrial scale a few windmills here and an electric car there won't make a blind bit of difference. So rather than condemn Ukip supporters as some sort of backward thinking flat earthers, you should remember they were right about the euro and are right about how useless and costly "green energy" is .