Explain how human health may suffer or benefit from global climate change.

People may face increased likelihood of exposure to some health risks due to global climate change. These risks include heat stress, infectious diseases resulting from flooding and failed sewage systems, the movement of disease vectors such as malarial mosquitoes into new warmer and wetter areas, and injuries due to increased storm frequency and intensity. A warmer world might, however, present fewer cold-related diseases and injuries such as hypothermia and famine. Then, there are the obvious health problems that will arise as agriculture and water supplies gradually fail in some populated areas producing refugees and the logistics of supplying them with basic health crises such providing food, water, and medical treatment.