| International Panel on Climate Change – Special report on 1.5 degrees | link |
| UK Committee on Climate Change – independent advisory body | link |
| UN Climate Change Conference, UK presidency due November 2021 – COP26 | link |
| National Oceanic and Atmospheric Administration, Arctic ice-sheet prediction | link |
| NASA – A world of agreement, temperatures are rising | link |
| GreenFacts – Impacts of 4 degrees of warming | link |
| National Oceanic and Atmospheric Administration (USA) – 4 degrees of warming | link |
| Carbon Brief – What is a 4 degree world? | link |