<p>The study by the Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB) shows that light pollution, known as skyglow, promotes the growth of cyanobacteria and stimulates matter cycling in lakes. The research used a unique lake laboratory in Stechlinsee, where 24 experimental cylinders were used to study the effects of light pollution on the water ecosystem. The results indicate that low light intensities, such as typical skyglow, can significantly increase the abundance of cyanobacteria and stimulate the carbon cycle in the lake.</p>