As usual, things quickly become very polarised and personal here. For my part, it's difficult to deny that we are wrecking this planet and it's very difficult to see how we can reverse the process when we concentrate on economic growth, productivity and consumerism. No-one wants to hear that we need to cut back and I remember when the like of Jonathan Porritt and the Green Party were considered cranks. These days most of us are wiser than we were about the environment....