New research by scientists at the University of Minnesota (U of M) and Rensselaer Polytechnic Institute indicates that oxygen levels in the planet's freshwater lakes are declining rapidly due to climate change and land use. Published Wednesday in the journal Nature, the project analyzed more than 45,000 dissolved oxygen and temperature profiles collected between 1941 and 2017, from nearly 400 lakes around the globe. Among those lakes are 84 from...