References:
- Conserve Energy Future: Retrieved from: http://www.conserve-energy-future.com/causes-effects-solutions-of-overpopulation.php
- Deforestation Images: Click Here.
- One for All Game: Retrieved from: http://www.worldof7billion.org/about-us/
- Over crowded Market image: environmentblog, 80559735@N04
- Over crowded street image, Overcrowded earth drawing: Conserve Energy Future. (2014) http://www.conserve-energy-future.com/causes-effects-solutions-of-overpopulation.php
- Population Connection (2013): Retrieved from: http://www.worldof7billion.org
- Schlessinger, R. (2013). The 2014 U.S. and World Populations
- Slum and Traffic jam image: 2009-2014 Institute for Population Studies. Howmany.org.
- www.scope.org