Answer the following question given this paragraph: 

Sulfur Oxygen Compounds The two common oxides of sulfur are sulfur dioxide, SO2, and sulfur trioxide, SO3. The odor of burning sulfur comes from sulfur dioxide. Sulfur dioxide, shown in Figure 18.47, occurs in volcanic gases and in the atmosphere near industrial plants that burn fuel containing sulfur compounds.


Q: What sulfur compound occurs in volcanic gases and in the atmosphere near industrial plants?


A:
sulfur dioxide