I'd like to share with you about ozone hole. Ozone is a layer that protects Earth from ultraviolet rays. But now, ozone layer is damaged because chemical industry pollution. Even ozone layer in Antarctica has been perforated. The ozone layer protects the earth from exposure to Ultra Violet B (UV-B) which is very harmful to living things on earth. UV-B which has a wavelength of 280-315 nm, some is absorbed by the ozone layer, thus the amount of UV-B reaching the earth very few. Exposure to UV-B on humans can cause skin cancer, cataracts and reduce the immune system. UV-B exposure can also damage plant life, single-celled organisms and aquatic ecosystems. And than ice in the North Pole melts. It is very dangerous for species animals in the North Pole because they will lose their habitat.
The ozone destroy due CFC. CFC found in AC, refrigerator, push the material in throwers (aerosols), including spray cans for air freshener, hair spray or perfume. One CFC molecule has a lifetime of 50 to 100 years in the atmosphere before it abolished. Within about 5 years, CFC moving up slowly into the stratosphere (10-50km). CFC molecules break down after mixing with UV light, and release chlorine atoms. It attempts to destroy the chlorine atoms and ozone generating ozone hole. Depletion of the ozone layer will lead to more UV rays enter the Earth.
