During the past decade, Houston’s notoriously polluted air has become — well, if not quite good, then not quite as bad, says NPR’s Richard Harris. (Pay no attention to what that ozone app may or may not tell you.) How? Well, it seems that pollution regulators in the early aughts had been worrying about all the wrong gases: “They were going all-in against [only] one of the pollutants that create smog, while downplaying the role of other emissions from the petrochemical plants,” reports Harris. “Barges carting chemicals up and down the [Ship Channel] were leaking. . . . And some types of storage tanks were leaking as well. . . . It turns out that routine day-to-day emissions were not the biggest problem.” Since then, regulations targeting those chemicals, like ethylene — as well as the use of infrared cameras that can spot them — appear to have made a difference: Port of Houston Authority employee Dana Blume tells Harris: “I can look out of my office window now and almost every single day see downtown.” [NPR; previously on Swamplot] Photo: Flickr user stmu_mike
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