This slideshow from Popular Science looks at some of the most heavily polluted cities in the world.
"The World Bank estimates that 16 of the world's 20 most polluted cities are found in China's industrial areas."
"In fact, according to a study by Italian environmental group Legambiente, Milan has more smog than any other city in Europe and the continent's second-highest level of ozone. Most of the problem comes from the city's love of driving, but that's changing quickly: Congestion pricing in downtown Milan implemented in January has dropped traffic by 26 percent and, residents hope, will lead to drops in smog as well."
"Pittsburgh recently wrested the title of America's most polluted city from Los Angeles-at least when it comes to short-term particle pollution like soot, aerosols, heavy metals and exhaust. But the city of 335,000, which has transitioned from an industrial town to one of the country's most livable cities, may not be to blame for its bad air. According to some research, much of Pittsburgh's pollution is blown in from factories and power plants in Ohio."
FULL STORY: The World's 10 Worst Cities

Rethinking Redlining
For decades we have blamed 100-year-old maps for the patterns of spatial racial inequity that persist in American cities today. An esteemed researcher says: we’ve got it all wrong.

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

California High-Speed Rail's Plan to Right Itself
The railroad's new CEO thinks he can get the project back on track. The stars will need to align this summer.

‘Displaced By Design:’ Report Spotlights Gentrification in Black Neighborhoods
A new report finds that roughly 15 percent of U.S. neighborhoods have been impacted by housing cost increases and displacement.

Nevada and Utah Groups Oppose Public Land Sell-Off Plan
A set of last-minute amendments to the budget reconciliation bill open up over half a million acres of federally managed land to sales.

More Than a Park: A Safe Haven for Generations in LA’s Chinatown
Alpine Recreation Center serves as a vital cultural and community hub in Los Angeles' Chinatown, offering a safe, welcoming space for generations of Chinese American residents to gather, connect, and thrive amidst rapid urban change.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
City of Clovis
City of Moorpark
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
Regional Transportation Commission of Southern Nevada
Toledo-Lucas County Plan Commissions