There is evidence suggesting that these and other factors have already induced a reduction of mortality in some countries, but the potential of these strategies varies greatly according to factors such as political decision making, technological development, profile demographics and underlying climatological conditions. Constraints to human adaptability further stress the need for mitigation strategies contributing together with adaptation plans to tackle the problem of climate change. These strategies, in turn, would ultimately maximize other co-benefits for health, for example through improved air, water or food quality.