Geoengineering will save us from the climate crisis, its champions insist.

By using technology either to remove carbon dioxide from the atmosphere or to deflect some solar radiation away from Earth, they claim, we can undo the damage wrought by humanity's failure to reduce greenhouse gas emissions.

But while it certainly sounds like a convenient solution, there is no proof that it will work — and no telling what the side effects could be. In the view of Pacific islanders, it barely merits discussion.