| Answer | Crossword Clue |
|---|---|
| DIOXIDE | Carbon ... (greenhouse gas) |
| OZONE | Greenhouse gas |
| METHANE | A greenhouse gas |
| WATER | Important greenhouse gas |
| OZONE | Triatomic greenhouse gas |
| OZONE | A greenhouse gas |
| COAL | Greenhouse gas culprit |
| EPA | Greenhouse gas regulator: Abbr. |
| COAL | Big greenhouse gas culprit |
| EPA | Org. concerned with greenhouse gas |
| METHANE | Greenhouse gas produced by cows |
| OZONE | Blue gas in the greenhouse effect |
| MML | G-8's deadline for halving greenhouse gas emissions |
| EPA | Federal org. with a "personal greenhouse gas emissions calculator" |
