Honestly, at this point, all we can do is invest in our own infrastructure and help developing nations develop reasonable and balanced plans. Climate change is going to happen, it is already happening, and now we just need to deal with it. We need to fight the new battle, not pretend we're still fighting the old battle which we already lost[.
Its a common and dangerous fallacy to assume so. Climate change will of course happen, but the
amount of it is crucial. The higher the temperature rise the larger the amount of climate change. It is very important to keep the effects of climate change on a level we can manage, otherwise this will spin out of control. Plus there are some self inflating tendencies if the temperature rises above certain levels, if the permafrost start melting large reserves of CO2 will be released and the process accelerates.