Bloomberg: Four protesters from the Greenpeace environmental group climbed atop a British Airways Plc Boeing 777 aircraft at London’s Heathrow airport to protest climate change and plans to build a third runway. Police responded and flights weren’t affected, airport operator BAA Ltd. said today in an e-mailed statement. “All of the protesters have now been safely removed and arrested by the police,” the company said. In November, the U.K. government joined other carriers and business …