Adaptation is likely to be the most attractive strategy given that reality. Even if we could write down precisely what will happen to the global mean temperature in ten years, 50 years and so on, there just remains a certain amount of uncertainty. We have never experienced a three degree celsius increase over long periods of time. There is no theory from physical theory, physics or chemistry that can use pro-proportional data for adaptation. If you're going to do something about climate change then it's better than not doing anything at all.