Imagine you’re diving into the ocean. You descend 200 meters and you reach the ocean floor, where you see these bubbles popping up into the water. Imagine you go even deeper into the ocean floor looking for the source of these gas bubbles. Well, this is what I do, because these bubbles are methane: a greenhouse gas more potent than carbon dioxide for global warming. Some microorganisms living in the ocean floor produce lots of methane, while some other microorganisms can consume almost all of that methane, preventing very large methane emissions from the ocean. But with the ocean getting warmer, these microorganisms could produce more methane. Or they could not be able to consume more methane, increasing methane emissions from the oceans, which could accellerate climate change. Therefore, in a research ship I collect sediments from the ocean floor. Then I put them into bottles, so I can study how these microorganisms live, to create strategies to control methane emissions from the ocean. So that we can solve big problems like climate change using tiny microorganisms.