The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (chlorofluorocarbons (CFCs), HCFCs, halons).
Ozone depletion occurs when chlorofluorocarbons (CFCs)—formerly found in aerosol spray cans and refrigerants—are released into the atmosphere. You just studied 12 terms!
Scientists accept that the depletion in the ozone layer is caused by human-made gases called CFCs, which were first developed in the 1930s for use in refrigeration systems and were then deployed as propellants in aerosol spray cans. The chemicals are stable so can travel from the Earth's surface to the stratosphere.
Explanation: Ozone depletion is primarily caused by human activities. The main effect of ozone depletion is an increase in UV-B rays reaching the earth's surface. Causes : chlorofluorocarbon (CFCs), halons, and other compounds deplete the ozone layer.
What is ozone? How do CFCs cause ozone depletion? Ultraviolet radiation breaks down CFCs, molecules containing chlorine. Chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.
At the poles, CFCs attach to ice particles in clouds. When the sun comes out again in the polar spring, the ice particles melt, releasing the ozone-depleting molecules from the ice particle surfaces.
chlorofluorocarbonsFreons are chlorofluorocarbons and are responsible for depletion of ozone layer.
Ozone depletion is the destruction of ozone in the stratosphere, where it shields the earth from harmful ultraviolet radiation. Its destruction is caused by chemical reactions in which oxides of hydrogen, nitrogen, chlorine and bromine act as catalysts.
about depletion of the ozone layer is the anticipated increase in. the amounts of ultraviolet radiation received at the surface of. the earth and the effect of this on human health and on the. environment. The prospects of ozone recovery remain uncertain.
Ozone layer depletion causes increased UV radiation levels at the Earth's surface, which is damaging to human health. Negative effects include increases in certain types of skin cancers, eye cataracts and immune deficiency disorders.
Once the ozone layer is depleted, ultraviolet rays will pass through the troposphere and eventually to earth. These rays cause ageing of the skin, skin cancer, cataract and sunburn to humans as well as animals. Phytoplankton dies in the presence of ultraviolet rays which results in a decrease in fish productivity.
Complete answer: - Ozone layer depletion is the gradual thinning of the earth's ozone layer in the upper atmosphere caused due to release of chemical compounds containing gaseous bromine or chlorine from industries and human activities.