Above is the Climate Change Vulnerability Index. Dark blue indicates high risk; light green indicates low risk. Larger version of the map here. New Scientist summarizes the data:

Bangladesh comes top of the "extremely vulnerable" category because of its large population, extreme rural poverty and high risk of flooding. India is second because of its billion-plus inhabitants. Other Asian nations at risk include Nepal, the Philippines, Afghanistan, Burma, Cambodia and Pakistan, which is still recovering from floods that engulfed a tenth of the country.

African nations judged at extreme risk are Madagascar, Mozambique, Zimbabwe, Ethiopia and Malawi.

Yglesias vents:

 Presumably “I should be allowed to steal this Bangladeshi man’s land and sell it for profit” is not a free market position. Nor is “I should be allowed to have my cattle eat this Bangladeshi man’s grass and then sell it for profit” a free market position. I don’t think “I should be allowed to cut costs by dumping the toxic waste byproducts from my family on this Bangladeshi man’s agricultural land” makes a ton of sense as a free market position.