We’ve all heard the news. We have been – and continue to – pump too much carbon dioxide into the atmosphere. Just like its ‘naturally produced’ counterpart, not all of the human-generated carbon dioxide stays in the atmosphere. In particular, plants on the land are what we call a carbon sink. They take up the carbon dioxide and use it for photosynthesis (which also produces oxygen as a waste product – hurrah for plants!). Plants do a pretty nifty job but holding an estimated 85% of the active carbon on the planet and 25% of annual human carbon dioxide emissions, the oceans are also an extremely important carbon sink.