A supervisor at the Energy Department's international climate office told staff this week not to use the phrases "climate change," "emissions reduction" or "Paris Agreement" in written memos, briefings or other written communication, sources have told POLITICO.Employees of DOE’s Office of International Climate and Clean Energy learned of the ban at a meeting Tuesday, the same day President Donald Trump signed an executive order at EPA headquarters to reverse most of former President Barack Obama's climate regulatory initiatives.