So he used the lowest possible option. The idea that every country in the accord, especially China, Russia, India are going to follow those accords is fairly naive, don't you think?
If everything went perfectly, it may have an impact, but we all know how often that happens.
Let me ask you this, do you think it was fair? Do you think China and India being able to increase their carbon emissions while the West pays for them to do so is right? It is a crappy deal.