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
Person of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The common plural of "person", "people", is often used to refer to an entire nation or ethnic group (as in "a people"). The plural "persons" is often used in philosophical and legal writing. In ancient Rome, the word "persona" (Latin) or "prosopon" (πρόσωπον; Greek) originally referred to the masks worn by actors on stage. The various masks represented the various "personae" in the stage play. The concept of person was further developed during