Is it too late to reverse climate change?

Short answer: No — but "reversing" it fully isn't really on the table either. The realistic goal now is to limit and manage the damage, not undo it.

Here's the nuanced picture from current climate science:

What's no longer possible

Some warming and its effects are already locked in. Impacts like biodiversity loss, glacier retreat, and ecosystem collapse can't simply be undone within human timescales, and nature and carbon-capture methods can't remove greenhouse gases fast enough at scale to fully reverse warming already in motion. Scientists at NASA similarly note it will take several decades, or potentially centuries, to reverse the damage already done to the environment.

Where things actually stand right now

We're already very close to, or past, the symbolic 1.5°C threshold on an annual basis. A new benchmark timeseries shows a clear exceedance of 1.5°C in 2024 by the annual mean (1.62°C), while the 20-year mean is set to cross this threshold around 2028. Recent years have driven this home: 2023, 2024 and 2025 marked the three warmest years on most global datasets.

On the policy side, the gap between pledges and what's needed is significant. The 2025 Emissions Gap Report and the outcome of the first global stocktake clearly reveal that we are not on track to meet the 1.5°C target under the Paris Agreement. As a result, if we still wish to stick to the long-term target, so-called climate overshoot is becoming inevitable.

Why "too late" isn't quite the right framing

Scientists emphasize that overshoot and continued warming aren't a binary "doomed vs. saved" situation — every fraction of a degree matters. The more we overshoot the 1.5°C threshold, the more serious and widespread the negative impacts will be, which means it is never "too late" to take action. Technically, staying closer to that target is still within physical reach: in theory, it is still physically possible to avoid spending down the carbon budget required to limit warming to 1.5°C through rapid, sustained emissions reductions. The IPCC's own framing backs this up — technically, the 1.5°C pathway is still achievable; the IPCC is explicit that the technologies and knowledge needed to halve emissions this decade already exist. The gap is not one of capability — it's one of deployment speed and will.

Many scientists now talk about a "limited overshoot" strategy rather than permanent failure: temporary, limited, and reversible overshoot is becoming the future focal point for global climate action to retain the 1.5°C goal, rather than exceeding it forever.

Bottom line

So: too late to go back to how things were, not too late to make things significantly less bad than they'd otherwise become.