Further research
To learn more about population concerns, from the new-era ZPG advocates to the United Nations reports, check out these links: (External Link) and (External Link)
References
Caldwell, John Charles and Bruce Caldwell. 2006. Demographic Transition Theory. The Netherlands: Springer.
CIA World Factbook. 2014. "Guide to Country Comparisons." Central Intelligence Agency World Factbook . Retrieved October 31, 2014 (https://www.cia.gov/library/publications/the-world-factbook/rankorder/rankorderguide.html).
Colborn, Theo, Carol Kwiatkowski, Kim Schultz, and Mary Bachran. 2011. "Natural Gas Operations from a Public Health Perspective." Human&Ecological Risk Assessment . 17 (5): 1039-1056
Connor, Phillip, D'Vera Cohn, and Ana Gonzalez-Barrera. 2013. "Changing Patterns of Global Migration and Remittances." Pew Research Centers Social Demographic Trends Project RSS. N.p., Retreived October 31, 2014 (http://www.pewsocialtrends.org/2013/12/17/changing-patterns-of-global-migration-and-remittances/).
Dart, Tom. 2014. "Child Migrants at Texas Border: An Immigration Crisis That's Hardly New." The Guardian [Houston]. www.theguardian.com. Guardian News and Media Limited. Retrieved October 30, 2014 (http://www.theguardian.com/world/2014/jul/09/us-immigration-undocumented-children-texas).
Ehrlich, Paul R. 1968. The Population Bomb . New York: Ballantine.
Environmental Protection Agency. 2014. "EPA's Study of Hydraulic Fracturing and Its Potential Impact on Drinking Water Resources." U.S. EPA, September 14. Retrieved October 29, 2014. (http://www2.epa.gov/hfstudy).
Fox News, and Associated Press. 2014. "Protests Turn Back Buses Carrying Illegal Immigrant Children." Fox News. FOX News Network. Retrieved October 30, 2014 (http://www.foxnews.com/us/2014/07/02/protests-force-buses-carrying-illegal-immigrant-children-to-be-rerouted/).
Henry, Terrence. 2012. "How Fracking Disposal Wells Are Causing Earthquakes in Dallas-Fort Worth." Texas RSS. N.p., August 6. Retreived October 29, 2014 ( (External Link) ).
IHS Global Insights. 2012. "The Economic and Employment Contributions of Unconventional Gas Development in State Economies." Prepared for America's Natural Gas Alliance , June 2012. Retrieved October 29, 2014. ( (External Link) ).
Malthus, Thomas R. 1965 [1798]. An Essay on Population . New York: Augustus Kelley.
Passel, Jeffrey, D'Vera Cohn, and Ana Gonzalez-Barrera. 2013. "Population Decline of Unauthorized Immigrants Stalls, May Have Reversed." Pew Research Centers Hispanic Trends Project RSS. N.p., Retreieved October 31, 2014 (http://www.pewhispanic.org/2013/09/23/population-decline-of-unauthorized-immigrants-stalls-may-have-reversed/).
Pew Research Center. 2013. "Immigration: Key Data Points from Pew Research." Pew Research Center RSS. N.p., Retrieved October 31, 2014 (http://www.pewresearch.org/key-data-points/immigration-tip-sheet-on-u-s-public-opinion/).
Popescu, Roxana. 2014. "Frequently Asked Questions about the Migrant Crisis." U-T San Diego. San Diego Union-Tribue, Retreieved October 31, 2014 (http://www.utsandiego.com/news/2014/jul/22/Migrant-crisis-FAQ/).
Reyes, Raul A. 2014. "Murrieta Immigration Protests Were Unfortunate, Unnecessary." The Huffington Post . TheHuffingtonPost.com, Retrieved October 31, 2014 (http://www.huffingtonpost.com/raul-a-reyes/murrieta-immigration-prot_b_5569351.html).
Simon, Julian Lincoln. 1981. The Ultimate Resource . Princeton, NJ: Princeton University Press.
The United Nations Refugee Agency. 2014. "World Refugee Day: Global Forced Displacement Tops 50 Million for First Time in Post-World War II Era." UNHCR News. N.p., Retrieved October 31, 2014(http://www.unhcr.org/53a155bc6.html).
U.S. Congress. 2008. The William Wilberforce Trafficking Victims Protection Reauthorization Act of 2008. 7311, 110 Cong., U.S. G.P.O. (enacted). Print.