Research on solar geoengineering has been side-lined, and its possible role in climate policy has gone largely undiscussed. All those who take part in such discussions as there are stress that solar geoengineering should at best be seen as a complement to decarbonisation, shaving off extreme risks while the world moves towards a fossil-free economy. But the fear that it would instead be treated as an alternative is sufficiently persuasive as to be pervasive. If 2023 is not an aberration, though, and the world really is moving into an accelerated phase of warming, that reluctance might be reassessed. Emissions reduction should be able to slow the warming of the Earth within a few decades. Pursued with real zeal, it might bring it to an end this century. But it provides no cooling in the meantime. If that proves to be what the world wants, solar geoengineering is the only thing which looks able to provide it.