In Ili Ili Bua Bua, Normanby Island, Papua New Guinea, CO₂ bubbles out of intense volcanic vents in the reef. The excess carbon dioxide dissolves into the surrounding seawater, making water more acidic—as we would expect to see in the future due to the burning of fossil fuels. The town's name, Ili Ili Bua Bua, means "Water Water Bubble Bubble" in the local dialect. Read more about how reef scientist Laetitia Plaisance uses carbon dioxide seeps to study ocean acidification.