My theory is that politicians don't give a shit about global warming etc. but people keep moaning about it (sometimes the same people who moan about windmills). In order to placate the moaners the politicians give the go-ahead to build sodding great, HIGHLY VISIBLE, windmills. These are completely useless but they provide big profits for windmill builders, who are the sort of people that the politicians are really working for. The windmills spoil the view but the politicians don't give a sod about that as there are no profits in views (well there are, in terms of tourism, but realising that involves joined-up-thinking which the politicians can't do).