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<br />Air Pollution <br /> <br />Dust is a particulate contaminant <br />suspended in the atmosphere <br /> <br />· <br /> <br />( <br /> <br />The exposure to dusts can lead to a wide <br />variety of respiratory diseases, including <br />pulmonary fibrosis, obstructive lung <br />disease, allergy and lung cancer. <br /> <br />· <br /> <br />Reference Ene clo edia of World <br />Problems and Human Potential <br /> <br />· <br />