Some scientists say the best way to combat climate change is to talk about it among friends and family — to make private anxieties public concerns. For 2019, my New Year's resolution was to do just that, as often as possible, at the risk of spoiling dinner. I would force those conversations if I needed to. But, it turned out, people wanted to talk about it. Nobody was silent. I listened to their answers. I noticed the echoes. I wrote them all down.