Can you tell me two causes and two effects of depletion of ozone layer?

The main cause for the depletion of ozone is determined as excessive release of chlorine and bromine from man-made compounds such as chlorofluorocarbons (CFCs). CFCs (chlorofluorocarbons), halons, CH3CCl3 (Methyl chloroform), CCl4 (Carbon tetrachloride), HCFCs (hydro-chlorofluorocarbons), hydrobromofluorocarbons and methyl bromide are found to have direct impact on the depletion of the ozone layer. These are categorized as ozone-depleting substances (ODS). Chlorofluorocarbons are released into the atmosphere due to: Cleaning Agents Coolants in refrigerators Packing material Air conditioning Aerosol spray cans etc. Also, Ozone layer has been found to be affected by certain natural phenomena such as Sun-spots and stratospheric winds. But this has been found to cause not more than 1-2% depletion of the ozone layer and the effects are also thought to be only temporary. It is also believed that the major volcanic eruptions (mainly El Chichon in 1983 and and Mt. Pinatubo in 1991) has also contributed towards ozone depletion. Effects Skin Cancer: exposure to UV rays from sun can lead to increased risk for developing of several types of skin cancers. Malignant melanoma, basal and squamous cell carcinoma are the most common cancers caused by exposure to UV rays. Eye Damage: UV rays are harmful for our eyes too. Direct exposure to UV rays can lead to Cataract problems, and also Photokeratitis or snow blindness. Damage to Immune system: our immune system is also highly vulnerable to UV rays. Increased exposure to UV rays can lead to weakening of the response of immune system and even impairment of the immune system in extreme cases. Aging of skin: exposure to UV rays can lead to acceleration of the aging process of your skin. This will result in you looking older than what you actually are. It can also lead to photo allergy that result in outbreak of rashes in fair skinned people In humans, exposure to UV rays can also lead to difficulty in breathing, chest pain, and throat irritation and can even lead to hampering of lung function. UV rays affect other life forms too. It adversely affects the different species of amphibians and is one of the prime reasons for the declining numbers of the amphibian species. It affects them in every stage of their life cycle; from hampering the growth and development in the larvae stage, deformities and decreases immunity in some species and to even retinal damage and blindness in some species. read less

Chlorofluorocarbons (CFCs) The most widely used ODS, accounting for over 80% of total stratospheric ozone depletion. Used as coolants in refrigerators, freezers and air conditioners in buildings and cars manufactured before 1995. Found in industrial solvents, dry-cleaning agents and hospital sterilants. Also used in foam products — such as soft-foam padding (e.g. cushions and mattresses) and rigid foam (e.g. home insulation). Halons Used in some fire extinguishers, in cases where materials and equipment would be destroyed by water or other fire extinguisher chemicals. In B.C., halons cause greater damage to the ozone layer than do CFCs from automobile air conditioners. Methyl Chloroform Used mainly in industry — for vapour degreasing, some aerosols, cold cleaning, adhesives and chemical processing. Carbon Tetrachloride Used in solvents and some fire extinguishers. Hydrofluorocarbons (HCFCs) HCFCs have become major, “transitional” substitutes for CFCs. They are much less harmful to stratospheric ozone than CFCs are. But HCFCs they still cause some ozone destruction and are potent greenhouse gases. read less

The two causes of ozone depletion are : 1) Chlorofluorocarbons (CFCs) present in air conditioners, coolants in refrigerators, cleaning agents etc. 2) Carbon Tetrachloride used in fire extinguishers. The two effects of ozone depletion are: 1) UV rays can destroy the organic matter i.e plants and plankton cannot thrive. 2) Exposure to UV rays causes skin cancer, cataract etc. read less

We can not sure about the perfect explanation of this question but according to the theory, ozone is O3 when oxygen react with nascent oxygen in presence of ions make ozone, sometime considered as ozonosphere where this phenomenon occurred , depletion is the cause of disturbance of magnetic field around the ozone, this magnetic field disturb due to CFC & CO2 read less

1. Emission of chlorofluorocarbons from aerosols used in refrigerators, air conditioners etc. 2. During Spring season, when the intensity of sunlight is high, it provides energy to drive photochemical reactions and melt the polar stratospheric clouds, releasing considerable chlorine monoxide ClO, which is responsible to a great extent for the photochemical mechanism of ozone layer depletion. read less