Several climate activists were arrested after their group entered the grounds of a coal power plant in Jänschwalde, about 100 kilometres south-east of Berlin, on Monday. Two units – half of those in operation – that were taken off the grid as a result of the protest, were reconnected in the afternoon, a spokesman for the operator LEAG said, describing it as an “attack on the security of energy supply.” The company filed criminal charges against several individuals and investigations are under way for disturbing public businesses and trespassing. The activists blocked three areas around the sit…