According to a pair of studies by the University ofCalifornia's Lawrence Berkeley National Laboratory, doubling the number of mature trees and resurfacing dark-colored roofs and roads with heat-reflecting material in Sacramento County would almost halve
Funded by the U.S. Environmental Protection Agency, the study used aerial photographs taken with infrared cameras to make temperature maps; the images showed that rooftops and blacktops were the hottest areas in a city, while parks were the coolest. Preliminary releases indicate that on a hot day, the population center of the county is 1 to 2 degrees hotter than less-developed areas. As increased temperatures speed the formation of smog, lowered temperatures would decrease the amount of smog produced. The study calculated that doubling the number of trees along with cooling roof and pavement surfaces would result in a temperature drop of 2 to 3 degrees, and cause a 6 to 8 percent drop in ozone levels.
Thanks to California 2000 Project
FULL STORY: Changes in Urban Landscape Can Cut Smog

Maui's Vacation Rental Debate Turns Ugly
Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

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

San Francisco Suspends Traffic Calming Amidst Record Deaths
Citing “a challenging fiscal landscape,” the city will cease the program on the heels of 42 traffic deaths, including 24 pedestrians.

Defunct Pittsburgh Power Plant to Become Residential Tower
A decommissioned steam heat plant will be redeveloped into almost 100 affordable housing units.

Trump Prompts Restructuring of Transportation Research Board in “Unprecedented Overreach”
The TRB has eliminated more than half of its committees including those focused on climate, equity, and cities.

Amtrak Rolls Out New Orleans to Alabama “Mardi Gras” Train
The new service will operate morning and evening departures between Mobile and New Orleans.
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