We use cookies for essential site function and analytics. How we use cookies

Wordabulary

sulfur dioxide

Pronunciation
Noun B1 Intermediate

Quick answer

A sharp-smelling gas released when fuels containing sulfur are burned, known for contributing to acid rain.

"Factories are required to filter out sulfur dioxide before releasing exhaust into the air."

Usage notes

Its chemical formula, SO2, appears often in environmental science texts alongside carbon dioxide.

Test yourself

Which word fits the gap? "Factories are required to filter out _____ before releasing exhaust into the air."

Answer: sulfur dioxide

In your own words, what does "sulfur dioxide" mean?

A sharp-smelling gas released when fuels containing sulfur are burned, known for contributing to acid rain.

Learn next at B1

Report a mistake on this page

Practice "sulfur dioxide" until it sticks

A free account gives you spaced repetition, quizzes and progress tracking.

Sign up free