Prosecutors say the ring smuggled thousands of illegal devices that let diesel-truck drivers belch hundreds of times more ...

The practice known as “rolling coal” occurs when a diesel truck is modified so that it can intentionally blast black smoke in abundance, and its origins can be traced back to truck pulling or ...

To continue this momentum, the mining giant on Tuesday announced a full transition from conventional to renewable diesel for ...

"Kinda the reason the EPA is shutting everyone down. Worst thing you can do is bring attention to diesel trucks by rolling coal," he wrote, according to court filings. -Lukas I. Alpert This ...