| Clue | Source | Date |
|---|---|---|
| Agrees enough’s converted into methane maybe | The Times Cryptic | 03 May 2022 |
| Cause of atmospheric warming | The Times Concise | 13 Sep 2021 |
| A cause of global warming | The Times Concise | 02 Dec 2020 |
| Warmer politician to put up with waffle | ||
| Talk by nursery producing methane, for example | ||
| Hero engages us, troubled by this threat to the environment |