Extreme Whether, a new “eco-drama” written and directed by Karen Malpede, centers on an embattled American climate scientist living in an idyllic wilderness estate in the Northeast Coast. Set during the record-hot summers of 2004 and 2012, the play pits the scientist against his twin sister in a no-holds barred family struggle over land ownership and the future use of their wilderness estate. In one corner is John Bjornson, a composite of famous climatologists. In the other is his twin sister, Jeanne, an energy spokeswoman married to a skeptical lobbyist.