One aspect of global warming that is infrequently mentioned is the propagation of diseases, especially vector-borne diseases. This is seen now in Europe and the US, and many of your best places to live in a warmer world will have to be shared with an increasing number of insects and arthropods. Think mosquitoes and ticks.

One of the major inhibitors of economic development in Africa and the Asian subcontinent is tropical diseases. People are just too sick too often to be highly productive. Global warming is likely to make this worse where it is and for the problem to spread.