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Save Trees Posters
Trees have a number of advantages. They keep the air clean by acting as a filter for dust, micro sized metals and pollutants such as ozone, nitrogen oxides, ammonia and sulfur dioxides. Trees also improve water quality, reduce storm water runoff, flooding and erosion. They also produce oxygen and save energy by keeping homes cooled. In addition, saving trees save you and the society money. For instance, over a period of 50-year, a tree can generate oxygen worth $31,250. It is obvious that it not only makes sense to save trees but also to plant more trees.