The Impact and Comment of Climate Change on Human Health.docVIP

The Impact and Comment of Climate Change on Human Health 　　The extreme weathers brought by global climate change at present， like draught， flood， freeze injury， hail， haze and sandstorm are directly affecting the global ecological system safety and bringing serious harms on human survival and development. The disasters not only change the world political pattern， but also speed up social turmoil and trigger regional conflicts. 　　The adaptive capacities of mankind to climate change include inheriting one and acquired one. The former one shows in the congenital expressive way and physiological feature in various climate conditions. Such as in tropical areas， because of the weather， people there have dark skin and short figure and their descendants all inherit this feature to adapt themselves to the weather; the latter one develops in special weather conditions by inheriting adaptive ability within the life period of human beings. Such as children born in high altitude localities have light weight and imperfect nervous system， but due to the lack of oxygen， they get better respiratory system. Therefore， people always get used to the weather of their birth place. Such as southerners are used to wet and rainy days， while northerners are used to dry and windy days， and when people change the living place， they would be unacclimatized and be ill. Human body is very sensitive to climate change and meteorological factors affect human body through sensory organs. Changes in climate， weather and meteorology can cause physiological reaction of human beings. 　　Climate change brings many dangers to human survival and health and one of the consequences is the change in climatic zones that the boundary of tropical area would expand to subtropics and the temperate zone would become subtropical one. The statistics show that， one degree centigrade rise in global average temperature would cause the climatic zones move towards the polar direction of 100 kilometers. But this mov