According to statistics gathered by the World Health Organization, as much as 93% of the children of the world are constantly breathing in polluted air. Airbubble is a project developed by the London firm ecologicStudio that endeavors to address this terribile reality with a microclimate playground, a true bubble of clean air, in the public green space outside the Copernicus Science Center in Warsaw: a cyclindrical wooden structure clad in an ethylene tetrafluoroethylene (ETFE) membrane in which air-purifying microalgae are cultivated.[+]