Mark Sewell, a wastewater catchment manager at United Utilities, told the BBC: “Significant stretches of river were biologically dead in the 1980s but today they support thriving ecosystems and are ...

“I found these growing against a tree stump in our backyard in west San Ramon after several days of heavy rain,” writes Camille DeFer Thompson. Submitting a picture: Send a high-resolution JPEG file ...