Growing public concerns are not limited to environmental degradation such as biodiversity loss, soil depletion, and toxic rivers and oceans. It goes further through the risks it imposes of “epidemics, resource warfare, terrorism, and deaths from violent climate events” (Ehrlich and Ehrlich 2012). Malthus argued that growth in people responds to wages or incomes that are negatively correlated with population size (Lee 2011). On the other hand, climate change is positively correlated with population growth. Pollutants such as greenhouse gas emissions from industry, transportation, agricultural activities, deforestation and desertification are all associated with massive population growth. Therefore, overpopulation is a major contributor to environmental deterioration (Ehrlich and Ehrlich 2012). Further implications of overpopulation harm humans themselves, each individual added to the population will consume food, water and energy. Population pressure will require more energy to meet their needs (Ehrlich and Ehrlich 2012). This will result in inequalities among people due to scarcity of resources leading to hunger and poverty. The degradation of human life causes the transmission of diseases from animals and causes lethal epidemics (Ehrlich and Ehrlich 2012). It is agreed that economic, social and political factors overlap in terms of population growth. To meet the demand of a growing population, agricultural production must be increased by “70-100% by 2050”. This increase will be associated with increased energy consumption and the demands of the free market economy. Agriculture requires more fossil fuels and land to cultivate. Some rich countries like “China, Saudi Arabia and South Africa” buy land in… middle of paper… ping countries are a serious problem in overpopulated cities. Resource scarcity is not limited to energy shortages but could translate into water shortages in congested cities. For example, the decline of water supply in the “Nile Valley” has made countries compete for Nile water, putting a lot of pressure on Egypt to increase its population by 3% every year (Cassils 2004, 185) . Another implication is the increase in CO2 emissions by 2.5% per year, driven by annual GDP per capita and annual population growth (Mitchell 2012). Technology used at the beginning of this century caused more CO2 emissions in developed and developing countries, increasing the rate of consumption (Mitchell 2012). Human activities, technology and industry in crowded cities change the climate and cause environmental disasters such as cyclones and floods (Mitchell 2012).