1. The World Bank. (2017). Oceans, Fisheries and Coastal Economies. Available at www.worldbank.org/en/topic/environment/brief/oceans.
2. Woods Hole Oceanographic Institution, (2017). Available at www.whoi.edu/occi.
3. Risks of ocean acidification in the California Current food web and fisheries: ecosystem model projections
4. Marshall, M. (2012). Geo-engineering with iron might work after all. New Scientist, July 8. Available at www.newscientist.com/article/mg21528744.100-geo-engineering-with-iron-might-work-after-all.html.
5. Roach, J. (2004). Source of half Earth’s oxygen gets little credit. National Geographic News, June 4. Available at http://news.nationalgeographic.com/news/2004/06/0607_040607_phytoplankton.html.