One of the major questions around solar geoengineering is often summarized under the term “moral hazard”: could mere mention of the topic, or research into it, crowd out mitigation efforts? Some surveys support this “crowding out” hypothesis, while others point to the opposite effect: talk of solar geoengineering acting as a wake-up call that crowds in mitigation efforts. We here take this question online and conduct large-scale experiments on a social media platform to elicit under which conditions which effect dominates. We compare people’s reactions to different presentations of climate... Read more about Gernot Wagner — Moral Hazard