Useful piece in the New Internationalist on economic growth. Real profit and economic growth relies on exploitation of resources, both human and natural. Some growth may be possible, e.g. by exploiting the sun's energy, but we are so far over the level of consumption that the planet can cope with that further growth from where we are now cannot happen. And as the majority of modern economic growth has been fueled by oil, it is likely to end soon.
Economic decline is inevitable, it will either happen chaotically through the increasing cost of exploiting resources, such as tar sands, or it could be done in a managed and coherent way that makes life better. Either way, there will be a reduction in the exploitation of resources as the current rates can't continue.
You might think that Greens would welcome the ConDem government politicies which will quickly lead to economic decline. I suspect I would welcome them if they made society more equal, focussed on getting rid of the profit motive, reduced exploitation, protected the vulnerable and provided some infrastructure that reduces our need to consume. Sadly they are doing the opposite.
The key question is how can we make the best use of this time of decline, both as individuals and as a society.