Hmm, let me think, would I prefer a weaker economy with no fossil fuels yet a habtiable planet for all or would I rather we destroyed the planet and only the very rich nations survive ( if they're lucky ) ? Difficult one I'll accept.
The problem is that this is like the prisoner's dilemma. If all countries worked together to use renewable fuels, then all countries would benefit. But if some countries don't bother, then they will benefit from the work of other countries and also do better financially from their use of fossil fuels. So you're obviously not going to all countries to agree to drop fossil fuels.