https://www.scientificamerican.com/article/can-we-geoengineer-ourselves-out-of-an-el-nino-year/

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

https://www.scientificamerican.com/article/can-we-geoengineer-ourselves-out-of-an-el-nino-year/