| Clue | Source | Date |
|---|---|---|
| They fund projects that remove a gas from the atmosphere, which is a hint to what’s happening in four Across answers | Wall Street Journal | 07 Dec 2023 |
| They fund projects that remove a gas from the atmosphere, which is a hint to what's happening in four Across answers | ||
| Greenhouse gas mitigators | New York Times | 02 May 2019 |
| Greenhouse gas mitigators |