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Nothing but gray skies ahead

You want a small sign that things are returning to “normal”, here you go.

Houston’s air pollution is returning to normal levels, following a period of cleaner skies during the stay-at-home orders put in place to slow the spread the coronavirus.

As Gov. Greg Abbott moves to reopen Texas’ economy, vehicles are back on the roads and with them come emissions from the burning of gasoline and diesel.

Ozone levels have now surpassed legal limits five times since April 20 after staying unusually low for more than a month. Nitrogen oxide emissions — a key contributor to smog — are back near where they were before the coronavirus shutdowns began, said Daniel Cohan, an environmental engineering professor at Rice University.

“It looks like most of the reduction in nitrogen dioxide over Houston has now faded,” he said. “There appears to be a partial bounce back in travel.”

Hope you enjoyed the breathable air while it lasted.

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