Air pollution is a heterogeneous, complex mixture of gases, liquids, and particulate matter. Air pollution has become increasingly visible in cities and towns across world. Many factors contribute to air pollution including industry, lack of vehicular emission controls, dirt roads, poor fuel quality, open burning agricultural dust and pesticides and an expanding maquiladora industry. Our plan will lead to reductions in air pollutant emissions that cause smog and acid rain by up to 55% as early as 2018. To get there, our plan will set national caps for industrial emissions of four air pollutants commonly associated with smog and acid rain, namely nitrogen oxides, sulphur oxides, volatile organic compounds, and particulate matter. | Use of tree species in controlling environmental pollution - A review
