UNEP Warns That Climate Overshoot Need Not Be Permanent

Limit how high warming goes and work towards a return. The report focuses on limiting the overshoot and a possible return. It does not say the threshold no longer matters.

Clue: UNEP’s October 21 assessment shifts attention from avoiding 1.5°C overshoot to limiting its scale and duration. In the report’s lowest-overshoot pathway, warming peaks at roughly 1.7–1.8°C around mid-century.

Removing carbon dioxide from the air. The text requires both emissions cuts and carbon removal. One is not presented as a substitute for the other.

Clue: Deep emissions reductions and increasing carbon removal would give approximately a 50% chance of returning to or below 1.5°C by 2100. PBL, which contributed modeling, stresses the effort required. The pathway is conditional, not an assured forecast.

It depends on difficult actions and is not guaranteed. The text explicitly warns that success is uncertain or conditional. A scenario is not a guaranteed outcome.

Clue: Deep emissions reductions and increasing carbon removal would give approximately a 50% chance of returning to or below 1.5°C by 2100. PBL, which contributed modeling, stresses the effort required. The pathway is conditional, not an assured forecast.