Temperatures are warming all over the planet. The new book "Climatopolis" looks at what cities can do to survive.
IEEE Spectrum reviews the new book by economist Matthew E. Kahn, a Planetizen Interchange contributor.
"In long chapters on Los Angeles, New York, and several cities in China, Kahn appears to have more faith in the free market and the rationality of humans than this reader does. The likely rise in temperature and sea level in Southern California in 2050 should affect our actions now-leading to rational (and inevitably higher) electricity and water prices, and housing prices that reflect them, better city planning, and the like-but to assume that it will ignores the often irrational ways that humans move through the world."
FULL STORY: Book Review: Climatopolis: How Our Cities Will Thrive in the Hotter Future

Trump Administration Could Effectively End Housing Voucher Program
Federal officials are eyeing major cuts to the Section 8 program that helps millions of low-income households pay rent.

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

Ken Jennings Launches Transit Web Series
The Jeopardy champ wants you to ride public transit.

Crime Continues to Drop on Philly, San Francisco Transit Systems
SEPTA and BART both saw significant declines in violent crime in the first quarter of 2025.

How South LA Green Spaces Power Community Health and Hope
Green spaces like South L.A. Wetlands Park are helping South Los Angeles residents promote healthy lifestyles, build community, and advocate for improvements that reflect local needs in historically underserved neighborhoods.

Sacramento Plans ‘Quick-Build’ Road Safety Projects
The city wants to accelerate small-scale safety improvements that use low-cost equipment to make an impact at dangerous intersections.
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