Sources
https://climate.nasa.gov/causes/
http://www.cowspiracy.com/facts/
http://www.ucsusa.org/our-work/global-warming/science-and-impacts/global-warming-impacts#.WSH-tusrLIX
http://news.nationalgeographic.com/2016/06/adelie-penguins-antarctica-climate-change-population-decline-refugia/
http://nsidc.org/news/newsroom/20120620_emperorpenguins.html
https://nsidc.org/cryosphere/seaice/characteristics/difference.html
https://www.greenfacts.org/en/arctic-climate-change/l-3/5-arctic-animals.htm#1p1
http://www.cowspiracy.com/facts/
http://www.ucsusa.org/our-work/global-warming/science-and-impacts/global-warming-impacts#.WSH-tusrLIX
http://news.nationalgeographic.com/2016/06/adelie-penguins-antarctica-climate-change-population-decline-refugia/
http://nsidc.org/news/newsroom/20120620_emperorpenguins.html
https://nsidc.org/cryosphere/seaice/characteristics/difference.html
https://www.greenfacts.org/en/arctic-climate-change/l-3/5-arctic-animals.htm#1p1