Ocean acidification
Professor Ove Hoegh-Guldberg explains the threat that increased CO2 poses to marine organisms as it dissolves into the ocean. He shares some videos from a recent experiment his lab undertook at Heron Island Research Station on the Great Barrier Reef. Read more about the experimental setup in the paper Future reef decalcification under a business-as-usual CO2 emission scenario (https://www.pnas.org/content/110/38/15342.abstract) and for more in depth discussion of this general topic see Coral Reefs Under Rapid Climate Change and Ocean Acidification (https://science.sciencemag.org/content/318/5857/1737).