http://solarcooking.wikia.com/wiki/Solar_cooking_in_developing_countries
http://www.odec.ca/projects/2013/leel13a/Site/Background_Research.html
living on the moon video:
https://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10515
https://science.howstuffworks.com/environmental/green-science/solar-cooking.htm
http://www.solarcooker-at-cantinawest.com/solarcooking-howitworks.html
https://www.sciencelearn.org.nz/resources/1747-using-solar-energy
https://sites.google.com/site/suncookers/the-science-of-solar-cooking