BBC: Planting trees around rivers could reduce the height of flooding in towns by up to 20%, new research suggests. A study for the Environment Agency concludes that trees round a feeder stream can slow the rush of rainwater and save properties from flooding. But it warns that natural flood prevention methods do not always work. And it urges a strategic approach because foresting a whole catchment would be counter-productive. The report - from the universities of Birmingham and Southampton - says...