Black smoke emerging from the chimney means the world's 1.4 billion Catholics don't yet have a new pope. White smoke means the cardinals have chosen a new leader of the church.

Osbourne’s solo career has always been managed by Sharon. While recording his second solo album, Diary of a Madman, guitarist ...

It wasn't clear whether grey smoke was closer to black or white, for example. By the 1970s, the straw method had been abandoned in favor of more controllable chemical mixtures.