{Earth and Leaf Editorial – Tourist influx turns Windermere green, researchers say  – No sewage should be going into Windermere, none.  Matt Staniek is a local and national hero} {extract below} Tourist influx turns Windermere green, researchers say High visitor numbers are turning one of Britain’s most scenic lakes green, researchers say. A report funded by the UK space agency suggests a link between peak tourist periods and algal blooming at Windermere in the Lake District. Algal blooming is caused by warm temperatures and nutrients, and can make the water green and toxic. Campaigners are linking the blooms to discharges of sewage, which although mostly treated, are nutrient-rich. United Utilities,…