Global Knowledge for Climate and Public Health. Informing action to protect populations from the health risks of climate change. It is in response to growing calls for actionable information to protect people from the health risks of climate change and other environmental hazards. Climate and health are inextricably linked. Climate change, extreme weather events and environmental degradation have fundamental impact on human health and well-being. More people than ever before are exposed to increased climate-related health risks, from poor water and air quality to infectious diseases and heat stress.