ATM 103 Lecture Notes - Lecture 17: Oil Refinery, Volatile Organic Compound, Non-Road Engine

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Air pollutants are particles and gases in concentrations that endanger the health and well-being of organisms. Primary pollutants are emitted directly from identifiable sources. Secondary pollutants are produced via chemical reactions in the atmosphere with primary pollutants. Therefore pollution can exist either as particulate matter (aerosol) or trace gases. These pollutants consist of particulate matter, which is a mixture of solid particles and liquid droplets found in the air. Fine particles are less than 2. 5 micrometers in diameter most harmful. These are form composition, wood burning, and power generation. Coarse particles are less than 10 micrometers. These particles come from dirt roads and crushing and grinding operations. So2 is a colorless gas originating from the combustion of sulfur-containing fuel, such as coal and oil. Important sources are power plants, smelters, pulp and paper mills, and petroleum refineries. So2 is also a cause of acid rain.

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