population ecology : 12 min- draw out all of the graphs and label (don't fret over the exponential growth math)
http://www.bozemanscience.com/ap-es-012-population-ecology
TED ED - Hans Rosling- 10 min
https://www.ted.com/talks/hans_rosling_on_global_population_growth?language=en
Nitrogen FRQ rubric:
https://secure-media.collegeboard.org/apc/ap09_env_sci_sgs.pdf
