The destruction of ozone layer has affected the level of gases and oxygen in the atmosphere.Its increasing the level of __________ and climatic change.
Answers
The destruction of ozone layer has affected the level of gases and oxygen in the atmosphere.Its increasing the level of global warming and climatic change.
Answer:
Introduction
In the 1970’s it was discovered that every spring, a “hole” was formed in the stratospheric ozone layer in particular over Antarctica, and that some chemicals made by humans were responsible of the destruction of ozone. The very low winter temperatures in the Antarctic stratosphere cause polar stratospheric clouds which temporarily prevent “fresh ozone” produced in the tropical region to replace the destroyed ozone. The reduction of the ozone layer changes the UV-radiation reaching the earth surface and this has various impacts on the environment, on health.
In 1987, the governments of the world decided, with the Montreal Protocol, to progressively ban the use of ozone-depleting chemicals (or ODCs), a ban made possible by the progressive availability of “ozone-friendly” substitutes. Since then, the seasonal ozone hole has slowly begin to be reduced.
What is stratospheric ozone and how is it depleted?
Ozone is a specific molecule made of three atoms of oxygen combined which constitute a layer present in small amounts in upper part of the Earth’s atmosphere (stratosphere). It absorbs a large part of the sun’s biologically harmful ultraviolet radiation and, as such, is vital to human well-being and ecosystem health. Some human-made substances containing chlorine or bromine atoms (chloro-fluoro-carbons or CFCs, for instance) which are very stable are persistent long enough in the atmosphere to reach the stratosphere and the ozone layer. Their degradation by cosmic