Specific machinery is used to remove particulate matter from flue gases. To look at data showing how the emission levels of a variety of pollutants has changed over time, click here. Although complex, these devices have shown to be effective in the past with the overall levels of emissions for many pollutants dropping with the implementation of these control devices. It is important to understand that the extraction methods for each specific type of pollutant can differ, so the only the major methods are discussed. These control devices can be separated into two broad categories - devices that control the amount of particulate matter escaping into the environment and devices that control acidic gas emissions. Air pollution control devices are a series of devices that work to prevent a variety of different pollutants, both gaseous and solid, from entering the atmosphere primarily out of industrial smokestacks.
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