Again, an occasional exhale of white or black smoke when accelerating hard is acceptable. But if the smoke is relentless (especially during idling), it's best to take your vehicle to a mechanic ...

If the current pope were to pass away, another would be elected by the Vatican's cardinals to take his place. And either white or black smoke signals from the Sistine Chapel are used to signify ...

From our FOX23 Tower Cam, I could see flames and black smoke billowing from the stacks at H.F. Sinclair Refinery in west ...

And either white or black smoke signals from the Sistine Chapel are used to signify different stages in this super-secret election process. Article continues below But what does each colour of the ...