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
Vulgar Latin vocabulary or evolved forms of "tōtus" (originally "entire") for a similar meaning; Occitan/Portuguese/Spanish " cada" 'each, every', "tudo"/"todo" in Portuguese, "todo" in Spanish, "tot" in Catalan, "tout" in French and "tot" in Romanian. The plural "tutti" in Italian means "all, every" and can overlap in meaning with "ogni" ("ogni giorno" and "tutti i giorni" both mean "every day"), and the singular "tutto" still means "entire" as well as "all". Sometimes a Classical Latin word appears in a Romance language alongside the equivalent Vulgar Latin word: classical "caput", "head", and vulgar "testa" (originally "pot") in Italian, French and Catalan. In Romanian "cap"