Times (UK): Up to 25 hydroelectric schemes generating enough renewable energy to power 40,000 homes may be sited on stretches of rivers including the Severn and the Trent. British Waterways, which manages more than 2,200 miles of navigable canals and rivers, claims that its project will save 170,000 tonnes of carbon dioxide a year. Planning permission is being sought for the first five schemes, to be built next to weirs and dams on the Trent in the Midlands and the Aire, Ouse and Don in …