推荐回答（5个）
臭氧层是指大气层的平流层中臭氧浓度相对较高的部分，其主要作用是吸收短波紫外线。大气层的臭氧主要以紫外线打击双原子的氧气，把它分为两个原子，然后每个原子和没有分裂的氧合并成臭氧。臭氧分子不稳定，紫外线照射之后又分为氧气分子和氧原子，形成一个继续的过程臭氧氧气循环，如此产生臭氧层。自然界中的臭氧层大多分布在离地20-50千米的高空。臭氧层中的臭氧主要是紫外线制造。
2011年11月1日，日本气象厅发布的消息称，今年以来测到的南极上空臭氧层空洞面积的最大值超过去年，已相当于过去10年的平均水平值。以上说臭氧层是由紫外线和氧气结合后，形成氧分子和氧原子，形成臭氧层。问题一，紫外线不带臭，氧气也不带臭，所以紫外经和氧气结合后也不该带臭;问题二，紫外线与氧气的结合不单在表层，表层以内的地球空间都同样有紫外线和氧气结合的机会，照这么说来臭氧层就不该只是3mm(1气压)的厚度,而是20-50千米之内全都是臭氧层.结合问题一,二的解释是:地球的引力是20-50千米的高度,在这个引力范围内,地球聚集着氧气及其它多种空气成份(包括臭气),,3mm的臭氧层只是地球引力边缘与宇宙的分界点。
臭氧层是指距离地球25-30公里处臭氧分子相对富集的大气平流层。它能吸收99%以上对人类有害的太阳紫外线，保护地球上的生命免遭短波紫外线的伤害。所以，臭氧层被誉为地球上生物生存繁衍的保护伞。2005年的主题为“善待臭氧，安享阳光”；
2004年的主题为“拯救蓝天，保护臭氧层：善待我们共同拥有的地球”；2000年的“拯救我们的天空：保护你自己；保护臭氧层”；以及1998年的宣传主题为：“为了地球上的生命，请购买有益于臭氧层的产品”等。这些主题反映出对于保护臭氧层的作用，保护臭氧层的紧迫性和对于全社会共同保护臭氧层的倡议。
臭氧存在的价值之一就是吸收太阳光中的大部分紫外线，保护人体健康。
臭氧层是指大气层的平流层中臭氧浓度相对较高的部分，其主要作用是吸收短波紫外线。
臭氧层是指距离地球25-30公里处臭氧分子相对富集的大气平流层。
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