When is coal burning _ is given off
CO 2 energy vaporization SO2 pollution oxygen carbon smoke
A B C D E F G H
CO 2 and SO 2 are both given off when coal is burned to provide heat or to generate electricity.
When is coal burning CO 2 is given off
When is coal burning _ is given off (A) CO 2 (B) energy (C) vaporization (D) SO2 (E) pollution (F) oxygen (G) carbon (H) smoke