Beavers should be reintroduced into the wild to help clean up polluted rivers and stem the loss of valuable soils from farms, new research suggests. The study,  by scientists at the University of Exeter, found that a single family of beavers removed high levels of sediment, nitrogen and phosphorus from water that flowed through a 2.5 hectare enclosure in Devon.… Read More Beavers reduce river pollution by building dams, study shows