Moss could prove an unexpected helper in the fight against heat and air pollution in cities. This tiny plant can absorb water, capture fine particulate matter and indicate changes in the surrounding environment. That's why startups in Germany and the Netherlands are developing technologies that use moss to make our cities cooler and more livable.

Meanwhile, researchers are looking at ways to employ moss as a bioindicator that can make climate change, air pollution and temperature differences visible. That all sounds promising, but just how reliable are moss facades and moss mats in everyday use? Join us as we find out. One thing is already clear: this often overlooked plant can do much more than many realize.