Environmental pollution is a combined result of natural and man-made (anthropogenic) contributions. This Theme deals with the technologies and equipment available for control of anthropogenic pollution. There are different options for reducing the impact of pollutants but the most cost-effective is to trap pollutants at source. The major sources of man-made pollution are related to engineering activities, such as excavation and processing of raw materials, power generation, transportation, etc. The interdisciplinary engineering efforts for environmental pollution management at source are often defined as environmental engineering. Environmental engineering employs specific methodology of the traditional sciences and their engineering applications (physics and mechanical engineering, chemistry and chemical engineering, mathematical statistics, etc.) in order to describe and solve specific environmental problems. the variety of techniques available for minimizing pollution in gaseous emissions. Technology in this area has been developing rapidly. Gaseous emission control systems can generally be divided into those designed to remove particulates and those designed to remove pollutants, which are emitted as gases. Particulate removal techniques include cyclonic collectors and wet scrubbers, bag house fabric filters, electrostatic precipitators, etc. Gaseous pollutants are separated from the inert air stream through processes, such as condensation, absorption, adsorption, etc. Applied Combustion Science is yielding significant results both in the management of combustion emissions, and as a method for liquidation of pollutants. The first three Topics cover also a necessary amount of chemical engineering fundamentals, needed for better understanding of the principles on which the different control technologies are built.