English: Graph of reduction of one's carbon footprint for assorted actions in metric tons of carbon dioxide equivalent (tCO2e) per year by CMG Lee based on data by Wynes and Nicholas at http://sciencealert.com/ipcc-report-2018-easy-things-you-can-do-right-now-to-help-the-planet . The estimate is taken from future emissions of all descendants (not just immediate children), extrapolated from historical trends. ^[1] The calculation is obtained by ${\displaystyle (1/2)^{n}c_{i}}$ , where ${\displaystyle c_{i}}$ is the estimated carbon footprint of individual ${\displaystyle i}$ and ${\displaystyle n}$ is the number of generations. So, ${\displaystyle (1/2)c_{i}}$ if ${\displaystyle c_{i}}$ is an immediate child, ${\displaystyle (1/4)c_{i}}$ if ${\displaystyle c_{i}}$ is a grandchild, and so on.