Public health is greatly affected by factors such as changes in climate, water quality, food growing capacity, the natural environment around us and access to health care. How might climate change affect the spread of diseases such as malaria, cholera, meningitis and dengue fever? What effects do destructive storms have on children’s health? What are the long-term health effects of arsenic and other contaminants in drinking water? How can we best track health outcomes of exposure to particulate matter and other pollutants? How can we create sustainable sources of clean water, sanitation systems, and health care infrastructure to improve health in vulnerable communities?