Birds fly over a man taking photos of the exposed riverbed of the Old Parana River, a tributary of the Parana River, during a drought in Rosario, Argentina, on July 29, 2021. Climate change isn’t causing the multi-year drought that is devastating parts of Argentina, Uruguay, Brazil and Bolivia, but warming is worsening some of the dry spell’s impacts, a new study says. (AP Photo/Victor Caivano, File)