1.臭氧层臭氧是地球大气中的一种微量气体,由三个氧原子构成,是人们熟知氧(O_2)的同素异形体。臭氧在大气中通常分布在两层,即对流层和平流层中。对流层的厚度,从近地面向高空10千米～18千米的范围内,对流层中的臭氧对人类和生态环境是有害的。对流层向上至大约50千米左右的范围,就是通常所称的平流层。平流层保存了大气中90%的臭氧,形成了 1. Ozone Layer Ozone is a trace gas in Earth’s atmosphere and consists of three oxygen atoms. It is a known allotrope of oxygen (O 2). Ozone is usually distributed in two layers in the atmosphere, the troposphere and the stratosphere. The tropospheric thickness, ranging from 10 kilometers to 18 kilometers above ground level, contributes to the detriment of humans and the environment in the troposphere. The troposphere up to about 50 km range, is the so-called stratosphere. The stratosphere holds 90% of the ozone in the atmosphere and forms