Large-scale and global risk of adverse environmental changes on human health include climate change, stratospheric ozone depletion, biodiversity loss, changes in hydrological systems and freshwater resources, land degradation and strain systems that produce food.
To estimate the size and type of such an impact on human health requires a new vision, focusing on ecosystems and on the recognition that the provision of long-term good health depends largely on maintaining the stability and functioning of the biosphere systems that support life. It is also necessary to understand the complexity of systems on which we depend.
To protect the health of the global environmental changes we need to control many levels - from social and economic factors contributing to environmental change that occur as a result of the hazards and risks to the population. WHO liaison programs in the field of environment and health, for example, by providing expertise in the field of health for the UN Conventions on climate change, biological diversity and desertification, as well as counseling through the health sector with regard to the response that should be taken in connection with risks for health resulting from large-scale environmental changes.
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