Climate change (=> catastrophic events that are maybe caused by it) are killing "only" 100.000 people or so each year.
Climate change influences the economic activity in a country through crop production etc. and making lots of areas less liveable. As far as I know it does not take into account such factors, as I remember from reading about the methodology used for UN projections only included factors related to human society and no environmental factors. When you look at the projections for some African countries you have to seriously wonder about how any kind of carrying capacity would influence population growth.
