I = PAT that human population may stabilize at around 11.2 billion in 2100, the I=PAT equation will continue to be relevant for the increasing human impact on the environment in the short to mid-term future. Increased population increases humans' environmental impact in many ways, which include but are not limited to: The variable A, in the I=PAT equation stands for affluence. It represents the average consumption of each person in the population. As the consumption of each person increases, the total environmental impact increases as well. A common proxy for measuring consumption is through GDP per capita. While GDP per capita measures
Comparison between U.S. states and sovereign states by GDP (nominal) per capita from various sources. Figures are taken from dates ranging from the years 2013 to 2017. These figures for 2009 are based on the International Monetary Fund list on List of countries by GDP (nominal) per capita for world GDP, and the List of U.S. states by GDP per capita (nominal) figures. Comparison between U.S. states and sovereign states by GDP (nominal) per capita This is a comparison between U.S. states and countries' per capita nominal gross domestic product. The U.S. is not counted as a whole in the overall rank because this would be double counting since the states of