In our daily routines, whether we send an email, we post something on Facebook, or we download an episode from a TV show, we generate data that is stored in different data centres. These data centres and cloud providers consume 6% of the global electricity and generate 4% of the global CO2 emissions, posing a serious threat to the environment. The digital industry is trying to minimise its impact on the environment with different attempts, and the Spanish startup Submer is doing its part. The EIC-funded project is changing data centres to make them as sustainable as possible.