Everything around the subject of algae. Microalgae are the ancestors of complex land plants. Fossil finds indicate that these organisms existed 2.5 billion years ago and laid the foundations for the existence of higher life forms through the mass production of oxygen. Cyanobacteria, i.e. blue-green algae, are also commonly classified as microalgae. Together with the rainforests, they are among the largest oxygen producers on the planet. In our podcast we exchange views with experts on cyanos, sustainability, the city of the future and climate change.