That’s existential
Ord – same one - 20, research fellow at the Future of Humanity Institute at Oxford University, has advised the World Health Organization, the World Bank, the World Economic Forum, and the UK Prime Minister’s Office and Cabinet Office. (Toby, “4. Anthropogenic Risks”, The Precipice: Existential Risk and the Future of Humanity, Oxford)
A central problem with geoengineering is that the cure may be worse than the disease. For the very scale of what it is attempting to achieve could create a risk of massive unintended consequences over the entire Earth's surface, possibly posing a greater existential risk than climate change itself. Geoengineering thus needs to be very carefully governed—especially when it comes to radical techniques that are cheap enough for a country or research group to implement unilaterally—and we shouldn't rely on it as an alternative to emissions reductions. But it may well have a useful role to play as a last resort, or as a means for the eventual 92 restoration of our planet's climate.