Part 1: http://www.census.gov/popclock/

Part 2: https://biology-roots.com/wp-content/uploads/2015/11/5-Fast-Facts-about-hunger.pdf

Part 3: http://alliance.la.asu.edu/geomath/GeoMath3/lesson_files/Glenn/CROWDED/GlennChipsHfootprintUS.pdf

Part 4: http://www.footprintnetwork.org/resources/footprint-calculator/

Part 5: http://www.pbs.org/wgbh/nova/worldbalance/