A modelling study suggests marine cloud brightening could shade the eastern Pacific and reduce a global temperature spike from El Niño, but there could be unexpected consequences

A controversial geoengineering proposal suggests that brightening clouds off South America could weaken a burgeoning El Niño, but major technical and ethical questions remain

A modelling study suggests marine cloud brightening could shade the eastern Pacific and reduce a global temperature spike from El Niño, but there could be unexpected consequences