Man Made Natural Disaster: Acid Rain

1330 WordsApr 10, 20086 Pages
Ozone depletion, greenhouse effect, and acid rain are man-made disasters. The ozone layer is the part of the Earth's atmosphere which contains relatively high concentrations of ozone (O3). The cause of ozone depletion is the presence of Chlorofluorocarbons (CFCs) and related halocarbons gases in the atmosphere. In the presence of Ultraviolet light, these gases dissociate, releasing chlorine atoms, which then go on to catalyze ozone destruction. The greenhouse effect, on the other hand, is a natural warming process of the earth. When the sun's energy reaches the earth some of it is reflected back to space and the rest is absorbed. The absorbed energy warms the earth's surface which then emits heat energy back toward space as longwave…show more content…
Besides, the shiny surfaces of metals become dull. In a few words, acids are bitter enemies to metals. Stones, on the other hand, which are heavy and beautiful, can be affected by acids. In fact, acids can badly affect the appearance of stones. For instance, if white marbles were affected by acid rains, their white color would change to yellow, black and gray (Lioy, 2006). Acid rain has an effect on living things as well. Trees derive their nutrition primarily from element ions such as calcium, magnesium, and potassium, which have dissolved from rocks into the soil. Acid deposition adds hydrogen ions, which displace these important nutrients in a process called leaching. Leaching means that the ions are washed deeper into the subsoil or washed out of the top soil. If ions are leached from the soil, they are no longer available to the roots of the plants. Calcium ion is used in the cells of a tree for cell formation and in the processes that transport sugars, water, and other nutrients from the roots to the leaves. Magnesium ion is a vital element in photosynthesis and as a carrier of phosphorus which is important in the production of DNA. These ions may be unavailable to the tree roots because they have been leached away. As a result, animals will lose their food source. High acid levels in the soil help accelerate soil weathering and remove nutrients. It also makes some toxic elements, for example aluminum, more

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