Overpopulation is affecting our world in soooo many ways. Today I will go through how it affects Global Warming. Global Warming happens when humans and other species emit CO2, or Carbon Dioxide. This thickens the ozone layer, trapping the heat from the sun between the earths' surface and the ozone layer. Overpopulation is causing this because we are the ones emitting most of the carbon offset, meaning that if we had fewer people on our planet, there would not be as much carbon dioxide going into our atmosphere.