Oxford Dictionaries named "post-truth" the official word of 2016. Facts, it seems, can be obsolete in the current political discourse. But some inescapable realities endure — or that's what environmentalists hope. Climate, conservation and clean energy advocates around the country are planning their way forward under President Trump, setting strategy and adjusting their message. "We're preparing for the fight of our lives," said Melinda Pierce, legislative director for the Sierra Club.