Papal conclave ballots have been burned to maintain secrecy for centuries. Ballot smoke has been used to announce a decision ...

At that stage, the smoke diminishes and becomes much lighter. This fluctuating fumata—combined with the subjective ...

This article originally appeared on Naples Daily News: Florida brush fires: White, gray and black. What do the different colors of smoke mean?

For white smoke, a compound of the chemicals potassium chlorate, lactose, and rosin (also known as Greek pitch) is used, ...

Black smoke was seen rising from a chimney on the Sistine Chapel indicating no pope has been elected after the first day of ...