Marine cloud brightening is one of the more reasonable geoengineering approaches because the effect is rather localized and temporary. If the spraying is not su

Marine cloud brightening is one of the more reasonable geoengineering approaches because the effect is rather localized and temporary. If the spraying is not sustained, the cloud cover goes away again and that within weeks. The particles that serve as nuclei for condensation themselves are actually seasalt. It works like this: there are tiny droplets created by spraying seawater into the air. The water then evaporates, leaving salt particles as nuclei for droplet formation again. The salt content of the proposed measures would increase the naturally occuring levels by just 5-10% from what I know.