Actually one might want to buy lots of subarctic or humid continental real estate. If one believed that this cold land were due to get warmer and more valuable, that is. The advantage in knowing the future is in profiting from coming changes.<p>If buying real estate is impossible for warming enthusiasts, maybe they could lobby governments and organizations to do so instead. If India is destined to lose farmland, maybe it would benefit by owning options on farmland in Siberia?