The problem is, something has to be done if OUR world is to survive. And what has to be done will not be easy, popular or welcomed. The Greens ideas are good, it is just the implementing of them that is the problem.
We will eventually have to give up on our petrol and diesel vehicles, gas central heating will have to go and wind and wave will eventually have to supply our energy. At least, here in the UK, we are never far from tidal energy, and it is reliable and constant.