But high carbon levels in the ocean are causing the pH of seawater to drop and ocean acidity to rise. This phenomenon, known as ocean acidification, has given our top ally in the fight against climate change a serious case of heartburn. Fortunately, the weathering of rocks on land produces alkalinity, which has an “antacid” effect once it washes into the ocean. He is investigating the viability of an ocean intervention-based process known as ocean alkalinity enhancement, which he loosely describes as adding \"Tums\" to the ocean. “Ocean alkalinity enhancement has the potential to offset the effects of ocean acidification by increasing pH levels and neutralizing the CO2 building up in the water,” he says.