Along the shores of the English Lake District, signs caution visitors to keep children and pets away from the water due to the presence of cyanobacteria, commonly known as blue-green algae. These microorganisms, among the most prevalent on the planet, flourish when water temperatures rise or when there is an abundance of nutrients, forming dense blooms that resemble oil spills and can release harmful toxins. Despite these dangers, laboratories and design studios worldwide are harnessing the potential of cyanobacteria’s natural processes to address the significant environmental challenges posed by the fashion industry.