One of the bitter ironies of climate change is that while it is rich countries which have historically emitted all the carbon, and which today emit vastly more per capita, it is poor countries which will bear the brunt of the resulting changes in global climate. The 2001 Synthesis Report noted that climate change
is projected to increase threats to human health, particularly in lower income populations, predominantly within tropical/subtropical countries
Famine, drought, decreased water quality and a higher incidence of disease are all expected to take their toll, and primarily on the countries which can least afford it. But so far, no-one has really tried to put a number on the human cost. Now, NGO Christian Aid has - and the number is staggering. According to their report, The climate of poverty: facts fears and hope [PDF], climate change is expected to kill 182 million people by 2100 - and that's just in Sub-Saharan Africa, and just from disease, without even considering how many will starve. if that's not enough to make stopping climate change a moral imperitive for any person with any sort of conscience, then I don't really know what is.