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Air pollution has led to various adverse effects to forestry department and the industries in the sector. Pollutants that are known to cause much harm to trees are oxidants, fluorides, carbon monoxide, nitrogen oxides, sulfur dioxide, and volatile hydrocarbons (Gifford, 2006, p. 60). Oxidants react with the sunlight to produce toxins such as peroxyl acetyl nitrate (PAN) and ozone that are harmful to the trees. Ozone is commonly found in the upper strata of the atmosphere but, is considered to be highly harmful once found near the ground. High levels of these greenhouse gases easily damage trees and can easily wipe out an entire forest, which poses a threat to the industries in the field. Pollutants resulting from sulfur dioxide arise as a result of burning oil or coal to produce energy. They are also formed during the extraction of ores and when manufacturing products. Other manmade chemicals such as herbicide, pesticides, and fertilizers do detriment trees.