A local collects a sample of water from the Cerro Lake, formed from a meander of the Paraguay River, during a protest against a nearby tannery which allegedly throws chemical disposals into the lake causing its water to turn pinkish red, in Limpio, 25 km northeast of Asuncion, on August 22, 2020. - According to experts from the National University Multidisciplinary Lab, the colour of the water is due to the presence of heavy metals like iron, chromium, and zinc, among others, commonly used in the tanning process. (Photo by Norberto DUARTE / AFP) (Photo by NORBERTO DUARTE/AFP via Getty Images)