Cummins Inc will pay the largest-ever fine for violating the Clean Air Act

Cummins Inc. is set to pay the largest-ever fine for a Clean Air Act violation.

The engine manufacturer reached an agreement with the U.S. and the state of California to pay over a billion-dollar penalty to settle claims. The suit alleged Cummins installed emissions defeat devices, parts that bypass emission sensors, on hundreds of thousands of engines.

The Clean Air Act requires vehicles and engine manufacturers to make sure their products comply with applicable emission limits.

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