I think it is impossible for us to avert the coming environmental disaster. I say this because our global economy is based on increasing consumption; we need economic growth, new markets and new resources to exploit, otherwise the flow of capital will stop, existing debt will be called in, and the global economy will collapse.
To avert environmental disaster, we need to fundamentally change the way we view society. We need to become a 0% consuming economy. We need to be able to accept less and to consume less. Carbon taxes, carbon trading, eco-friendly houses are not going to make much difference if the end result is we still consume more shit than the environment can cope with.
Unfortunately, the kind of paradigm shift that is required will not happen until we completely fuck up the planet and most of the current population is wiped out through starvation and disease.
I feel quite hopeless about my life right now. It doesn't amount to much considering the coming end of civilisation.