Climate scientists should communicate potential worst case climate change scenarios more clearly to improve public understanding and strengthen action against future risks.
The article argues that while catastrophic outcomes such as major ice sheet collapse, extreme sea level rise, widespread flooding, food system failures and deadly heatwaves are not the most likely future, they remain scientifically plausible if greenhouse gas emissions continue unchecked. The author says these possibilities are often under communicated because scientists have traditionally focused on the most probable outcomes rather than low probability, high impact risks.
Using the hypothetical example of London becoming permanently uninhabitable due to the collapse of the Greenland and West Antarctic ice sheets combined with storm surges and rising sea levels the article highlights the scale of consequences that climate change could eventually produce if mitigation efforts fail.
The author also warns that poor communication of climate risks contributes to both climate denial and climate doomism. While downplaying severe risks can reduce urgency, presenting catastrophic outcomes as unavoidable may discourage public action. Instead, scientists are encouraged to communicate that these scenarios remain preventable through rapid emissions reductions and effective climate policies.
The article calls for a new global climate risk assessment that evaluates both the best and worst case climate futures, providing policymakers and the public with a clearer understanding of avoidable risks. Such an assessment, the author argues, would strengthen informed decision making and reinforce that although catastrophic climate impacts remain possible, they are not inevitable if global efforts to achieve net-zero emissions are accelerated.