The minerals calcium and sulfur were at the bottom of the ocean.

VOA: special.2010.01.04

The calcium and sulfur remained. The minerals formed gypsum rock.

VOA: special.2010.01.04

WMO scientists assess and monitor air pollutants such as ground-level ozone,smog, particulate matter, sulfur dioxide and carbon monoxide.

VOA: standard.2009.03.23

In Mr.Chavez's last speech here in 2006, he referred to President George W.Bush as the devil, saying he smelled sulfur in the room.

VOA: standard.2009.09.24

"It does not smell of sulfur in here anymore, it doesn't smell of sulfur.

VOA: standard.2009.09.24