Rolling coal
Modified diesel engines emitting sooty exhaust fumes
Rolling coal
Rolling coal (also spelled rollin' coal) is the practice of modifying a diesel engine to deliberately emit large amounts of black or gray diesel exhaust, containing soot and incompletely combusted fuel. Rolling coal is used as a form of anti-environmentalism protest. In some jurisdictions the practice is illegal, due to it violating clean air laws. Modifications may include the intentional removal of the particulate filter, installing smoke switches, large exhausts, and smoke stacks. Modifications to a vehicle to enable rolling coal typically cost from US$200 to US$5,000. The modification reduces the fuel economy of the vehicle.
Read on Wikipedia · Image Salvatore Arnone, CC BY 3.0
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