Poorer nations have heavier exports 
Average value per ton of exports for 108 nations as of 2007. Carbon regulation weighs more heavily on countries that export goods with a lower value-to-weight ratio, like food or minerals. Regions that may face the brunt of climate change according to different analyses (sub-Saharan Africa, south and southeast Asia, and western Europe) are highlighted.
Source: adapted from Appendix Figure 1 of Shapiro (2016), GDP data and oil exports data from World Bank