Microorganisms, such as bacteria, are not the first things that comes to mind when you think about climate. But it’s the smallest organisms that really dominate and shape our environment. Microorganisms are true all-rounders. Without them, life on earth would not be possible for us. About 70% of our planet is covered by oceans. It is therefore not surprising that they play a crucial role in the Earth’s climate. About half of the potent greenhouse gas CO2 is assimilated in the oceans, and half of our oxygen is produced there. More importantly, the oceans are the main storage facilities for CO2. In this seminar, I’d like to tell you why it’s important to look for the invisible and why it’s sometimes necessary to go to the remotest corners of our planet to better understand the effects of future climate change.

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