inversion

December 9, 2016, 6am PST
A weather inversion has caused the highest air pollution in the French capital in ten years. To coax commuters from their cars, free transit and odd-even license plate driving restrictions were enacted by Mayor Anne Hidalgo on Tuesday
NPR
November 20, 2009, 10am PST
2008 Census estimates reveal that in the city center of Fort Worth, Texas, the number of school-age children living in poverty has dropped whereas the surrounding suburban communities have seen increasing numbers.
Fort Worth Star Telegram