ABSTRACT
One of the most well used frameworks is the I=PAT equation, initially suggested two decades ago by Paul Ehrlich and John Holdren (1971). 4 The equation simply says that the impact on the environment is equal to Population times Affluence times Consumption. Another way to write this is an identity, as follows: 5 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315066943/ee9c977c-9893-447e-bda0-5e783e468fdc/content/pg_62_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
