Our planet is more than capable of being able to sustain a certain number of human lives, however, due to the damage that we are doing to the environment, the Earth may no longer be able to do so. Excess amounts of carbon dioxide and other pollutants that are being produced by transport, factories, farming and various other industries is causing a harmful effect on the atmosphere and adding to climate changes. These changes could very well disrupt plant cycles and create non-fertile land where there once was, lowering the global production of food and causing a horrible pandemic of famine that could very well stretch around the globe.

If populations were to continue to expand, this could very well cause an increase in pollutants that would enter the atmosphere. This would add to the depletion of the ozone layer and addition of Carbon dioxide (and other similar chemicals) which would essentially allow in harmful Uv Rays into earth and trap in additional heat, following the main issues of global warming and climate change. Now, this could have a harmful effect on plant cycles which depend upon specific conditions in order to thrive. If such plant's cycle's as wheat, any basic fruit/vegetable or staple food is disrupted and dies out, then the world would begin to see a shortage of food and therefore a begining of famine.