4. Population : Another cause of global warming is population. Since Carbon dioxide contributes to global warming, the increase in population makes the problem worse because we breathe out carbon dioxide. More people means more demand for food, more carbon dioxide in the atmosphere, more demand for cars, more demand for homes and they all in some how or other lead to global warming.
More demand for food will lead to more transportation since movement of goods and services is done by transportation sector. More demand for cars means more pollution in the air and more traffic on the roads which means longer waiting time on the traffic lights and will result more burning of fuel. More demand for homes means cutting down of trees to make way for homes, schools and colleges.