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                          地球保卫战 节约用水环保手抄报版面设计图

                          整理:老师板报网   时间:2018-04-13   评论:    地球保卫战 节约用水环保手抄报版面设计图

                          地球保卫战 节约用水环保手抄报版面设计图

                            地球,是宇宙的奇迹,生命的摇篮,人类共同的家园。她给人类提供生存的空间和资源,使人类在这里生息繁衍。让我们一起来认识地球,保护地球吧!

                            空气污染的危害

                            对人体健康的危害

                            人需要呼吸空气以维持生命。一个成年人每天呼吸大约2万多?#21361;?#21560;入空气达15~20立方米。因此,被污染了的空气对人体健康有直接的影响。

                            大气污染物对人体的危害是多方面的,主要表现是呼吸道疾病与生理机能障碍,?#32422;?#30524;鼻等粘膜组织受到刺激而?#30142; ?/p>

                            对植物的危害

                            大气污染物,尤其是二氧化硫、氟化物等对植物的危害是十分?#29616;?#30340;。当污染物浓?#32676;?#39640;?#20445;?#20250;对植物产生急性危害,使植物叶表面产生伤斑,或者直接使叶枯萎脱落;当污染物浓度不高?#20445;?#20250;对植物产生慢性危害,使植物叶片褪绿,或者表面上看?#24739;?#20160;么危害症状,但植物的生理机能已受到了影响,造成植物产量下降,?#20998;时?#22351;。


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                          地球保卫战 节约用水环保手抄报版面设计图评论
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                                                  双色球最新200期走
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