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Human Health
Impact of climate change on human health may come through direct or
indirect pathways.
Increased frequency of extreme warm events (heatwaves) will cause a large impact on human health. Extreme cold events cause fewer deaths on average, so reduction in these events will not balance increased mortality due to heatwaves.
Altered frequency and intensity of tornadoes, hurricanes, storm
surge, and lightning will impact human health and welfare.
Ecological - Changed populations, patterns and movement of pests and infective parasites due to climate change will put different human populations at risk. Increased temperatures generally promote increased pathogen populations thereby increasing chances of contamination of food and water supplies. Changed use of agricultural and horticultural pesticides due to changing patterns of pest populations will cause changes in contamination of food supplies.
Other - Sea-level rise and more extreme events causes more frequent displacements of populations and damage to infrastructure such as water supplies and sanitation systems. Rising temperatures leads to more civil disruption.