Philadelphia Inquirer: Global warming is Earth’s way of sending out a May Day distress call, many experts say, and bit by bit, communities and businesses across Chester County are responding to the plea for help. London Grove, for example, is the latest Chester County township to sign up for the Pennsylvania Clean Energy Communities Campaign. This month, the township will making a big push to enroll residents. “May is a big month for us for environmental awareness,” said Rhona Klein, township …