Sen. Ted Cruz, who recently announced his candidacy for the Republican presidential ticket, thinks, like many conservatives, global warming isn’t happening. As he said on Seth Meyers’ talk show on March 16, “Satellite data demonstrate for the last 17 years there’s been zero warming, none whatsoever.” It’s no surprise that Cruz picked that figure: 17 years ago was 1998, an “El Nino” year, when global temperatures were artificially elevated after which they returned to their normal gradually increasing rate. When you look at all the data published by the National Oceanic and Atmospheric Administration (not just the cherry-picked data that...