The meeting adopted the first "World Action Plan for the Ozone Layer". The plan includes monitoring ozone and solar radiation, assessing the impact of ozone depletion on human health, ecosystems and climate, and requesting the United Nations Environment Programme to set up an ozone coordination committee.
Extended data:
Ozone is distributed in the atmosphere from the ground to the height of 70km. The maximum concentration is at the height of 24km in mid-latitude, and gradually decreases towards the polar region, and the minimum concentration is at the height of polar region 17km.
From the late 1950s to 1970s, it was found that the concentration of ozone was decreasing. During the period of 1985, the British Antarctic expedition discovered the ozone hole at 60 south latitude, which attracted great attention from all countries in the world. The reduction of ozone concentration in the ozone layer increases the amount of ultraviolet radiation from the sun on the earth's surface, destroys the ecological environment and affects the normal survival of human beings and other biological organisms.
Chlorofluorocarbon chemicals (such as refrigerants, foaming agents, cleaning agents, etc.). ) is widely used by human beings and is not easy to decompose in the troposphere. When they enter the stratosphere, they are irradiated by strong ultraviolet rays, which decompose to produce chlorine free radicals, which react with ozone to reduce the ozone concentration, thus causing serious damage to the ozone layer.