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新一轮中考复习备考周期正式开始， Chemical pesticides are found to cause significant attritional effects to the nervous system and immune system after prolonged exposure. Chemicals pesticides are believed to cause illness by a variety of ways. Their harmful effects is obvious.New scientific research is uncovering some important negative health-related issues associated with pesticide use. For example,pesticides were identified by a National Cancer Institute study as a likely cause of elevated rates of certain cancers among farmers. Farmers are at higher risk than the general population for certain cancers: non-Hodgkin‘s lymphoma, skin melanomas, multiple myeloma, leukemia, and cancers of the lip, stomach, prostate, and brain. (责任编辑：admin) |