USING CAUSTIC SODA TO TRY TO COMBAT GLOBAL WARMING

The geoengineering method known as Ocean Alkalinity Enhancement (OAE) aims to speed up this natural process by resetting the ocean's pH.

Over four days, scientists added vast quantities of sodium hydroxide (caustic soda) – an alkaline chemical tagged with a red dye – to the waters off the coast of Boston. 

 Controversial geoengineering project sees scientists pump 65,000 litres of chemicals into the ocean to stop global warming | Daily Mail Online