Environmental Issues (Part-2)

What are the Environmental Issues? How many marks carried by the chapter Environmental Issues in class 12 board examinations? Why we study the chapter Environmental Issues? How important the chapter Environmental Issues is? What are the causes of air pollution? What are the adverse effects of ozone? What are PAN and PBN? Define the term smog and classified them in different categories? What is acid rain?

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The term acid rain can be defined as the mixture of wet and dry deposition (deposited material) from the atmosphere containing higher than normal amounts of nitric and sulfuric acids. The main gases responsible for acid rain is sulfur dioxide (SO2) and nitrogen oxides (NOx). Acid rain occurs when these gases react in the atmosphere with water, oxygen, and other chemicals to form various acidic compounds. The result is a mild solution of sulfuric acid and nitric acid. When sulfur dioxide and nitrogen oxides are released from power plants and other sources, prevailing winds blow these compounds across state and national borders, sometimes over hundreds of miles.