The table presents the source and the effect of four air pollutants. What are the four pollutants?
- A1 carbon dioxide, 2 methane, 3 nitrogen oxides, 4 sulfur dioxide
- B1 sulfur dioxide, 2 carbon dioxide, 3 methane, 4 nitrogen oxides
- C1 methane, 2 sulfur dioxide, 3 nitrogen oxides, 4 carbon dioxide
- D1 sulfur dioxide, 2 carbon dioxide, 3 nitrogen oxides, 4 methane