At his final press conference on Wednesday, the president said that some issues — for example, “how concerned are we about air pollution or climate change” — are just part of the “normal back-and-forth, ebb-and-flow of policy.”

Other issues, though, might get him riled up enough to speak out after he leaves office. “[T]here’s a difference between that normal functioning of politics and certain issues or certain moments where I think our core values may be at stake,” he said. He listed a few things that he would see as threats to those core values: “systematic discrimination,” “obstacles to people being able to vote,” “institutional efforts to silence dissent or the press,” and deportation of so-called Dreamers.

It sounded like an articulation of his priorities in the Trump era, and global warming didn’t make the cut. Likewise, in Obama’s farewell address last week, he mentioned climate change and clean energy, but his more passionate points were dedicated to sustaining a healthy democracy.

In September, Obama talked about focusing on climate change after he leaves office, but at that point, he thought Hillary Clinton would be succeeding him. Now that Donald Trump is moving into the Oval Office, Obama seems to be indicating that he’ll focus on other problems instead.

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Densifying cities could cut emissions more than doing energy retrofits on buildings.