Environmental Science
https://www.youtube.com/watch?v=NVd9Ch44s_Y (part1) https://www.youtube.com/watch?v=eOfMmPGMqoA (part2) https://data.footprintnetwork.org/?_ga=2.38139168.2016157881.1603818741-1516450532.1603217167#/ Ecological Footprint https://www.nytimes.com/2008/02/17/magazine/17wwln-safire-t.html?partner=rssnyt&emc=rss&_r=0 Footprint Calculator