Pollution Control
pollution control , in environmental engineering , any of a variety of means employed to limit damage done to the environment by the discharge of harmful substances and energies. Specific means of pollution control might include refuse disposal systems such as sanitary landfills , emission control systems for automobiles, sedimentation tanks in sewerage systems , the electrostatic precipitation of impurities from industrial gas, or the practice of recycling . For full treatment of major areas of pollution control, see air pollution control , wastewater treatment , solid-waste management , and hazardous-waste management . Next to the conservation of species from the loss of biological diversity , the control of pollution is the conservation problem of greatest magnitude; it might even be argued that pollution control is more urgent a...