| Clue | Source | Date |
|---|---|---|
| Not adding more CO2 | The Telegraph Quick | 23 Jun 2025 |
| Taxi taking king awfully near Luton Green? | The Telegraph Cryptic | 13 Jun 2025 |
| Environmental-friendly, sturdy scot having good, liberal nature (6,7) | ||
| Nocturnal bear, rambling, balancing his emissions? | The Times Quick Cryptic | 04 Jan 2025 |
| Motor alone burnt particles with no net emissions (6,7) | ||
| Counteracting emissions by planting trees | Newsday | 06 Jul 2023 |
| Having a balanced footprint, say | The New Yorker | 20 Jan 2020 |