We are losing wetlands three times faster than forests, according to the Ramsar Convention on Wetlands. When it comes to restoring them to their natural state there is one hero with remarkable powers – the beaver. Wetlands store water, act as a carbon sink, and are a source of food. The Ramsar Convention on Wetlands says they do more for humanity than all other terrestrial ecosystems – and yet they are disappearing at an alarming rate. The main problems are agricultural and urban expansion, as well as droughts and higher temperatures brought about by climate change. …These furry sharp-toothed rodents build dams on waterways to create a pond, inside which they build a “lodge” where they can protect themselves from predators. …”This transforms simple streams into thriving wetland ecosystems,” says Emily Fairfax, an ecohydrologist at California State University.