Air Quality

Looking up at a modern glass skyscraper with green tree next to it.

The Benefits of Trees

In addition to all the economically valuable services they provide, trees are beautiful as pure aesthetic objects and a welcome presence in any landscape.

February 19, 2024 - Corey Squire

Hazy sky with Portland, Oregon skyline barely visible in background. Man walking in foreground.

Report: 25 Percent of Americans Live With Poor Air Quality

Fires and extreme heat are generating more harmful particulate matter.

February 18, 2024 - Health Day

Google street view of brick three-story public housing buildings in Dorchester, MA.

Geothermal Network Project To Benefit Boston Public Housing

A pilot program seeks to be a model for electrifying groups of buildings or entire neighborhoods.

February 13, 2024 - Utility Dive

Freeway on-ramp sign for Interstate 15 in California.

California Commission Approves Freeway Expansion

The state Transportation Commission ultimately voted to move a controversial Inland Empire interstate project forward.

February 6, 2024 - Streetsblog California

Google street view of American Avenue overpass over Highway 99 in Fresno, California.

Transportation Secretary Orders Review of Fresno Highway Project

The decision follows a lawsuit by local groups who say Caltrans should not have exempted two interchange expansions from environmental review.

January 17, 2024 - Fresnoland

Close-up of lit burner on natural gas stove with blue flame and small yellow flame shooting up.

Berkeley Natural Gas Ban Remains Reversed

A court declined to revisit its decision to invalidate a city ban on natural gas hookups.

January 4, 2024 - Smart Cities Dive

View of green meadow with people and fall-colored trees in Central Park with Manhattan buildings in background.

Applying Trauma-Informed Design to Cities

How trauma-informed urbanism can make cities and their residents healthier and more resilient.

January 3, 2024 - Fast Company

Red, yellow, and green plastic playground equipment in small park under Claiborne Expressway overpass in New Orleans, Louisiana.

New Orleans Residents Fight Freeways With Science

A local coalition is collecting data that proves the harmful impacts of the Claiborne Expressway on the surrounding community.

December 22, 2023 - NPR

People walking on paved path in green city park with trees and tall city skyscrapers in background.

Green Spaces Benefit Neighborhoods—When Residents can Reach Them

A study comparing green space and walkability scores found that, without effective access to local parks, residents of greener neighborhoods don’t reap the health benefits.

December 3, 2023 - American Heart Association News

Two women walking on wide walkway among large trees next to neoclassical building in Cologne, Germany.

How Urban Design Impacts Public Health

With more and more people living in cities, designing equitably healthy urban spaces becomes a key question for policymakers.

November 1, 2023 - Wired

View of Albuquerque, New Mexico with green trees in foreground, mountains in background against sunset sky.

Growing ‘Climate Ready’ Urban Trees

A New Mexico research program will assess the health of seedlings to understand which trees will be most resilient to climate risks.

October 18, 2023 - Route Fifty

Aerial view of large warehouses in Southern California with hills in background.

California Air Regulators to Crack Down on Warehouses

Truck traffic to and from Southern California warehouses accounts for as much pollution as refineries, power plants, and other industrial polluters combined.

September 22, 2023 - Los Angeles Times

View of empty paved schoolyard with green picnic benches and basketball hoops in Malibu, California

Expanding Schoolyard Greening in California

To protect kids from extreme heat, California just distributed another $73 million to local school districts to transform schoolyards by converting blacktops to green spaces, planting trees, and other related efforts.

August 25, 2023 - Office of Governor Gavin Newsom

Black plume of smoke rising from petrochemical plant fire in Houston, Texas

EPA Grant Will Fund Air Pollution Tracking in Houston

The city wants to monitor air quality and measure cancer-causing emissions near two petrochemical plants, one of which announced plans for expansion last year.

July 17, 2023 - Smart Cities Dive

Night view of wildfire burning near residential area in California

Wildfire Exposure More Than Doubled Since 2000

More intense and widespread fires caused by climate change and changing air temperature are threatening more existing communities.

July 6, 2023 - Source NM

Male cyclists wearing helmet, sunglasses, and N95 mask stands with arms crossed in front of his bike

Wildfire Smoke Takes Toll on Bike Commuters

How can people on bikes protect their lungs from the harmful effects of wildfire smoke?

June 30, 2023 - Momentum Magazine

Natural gas stove with blue flame

Berkeley’s First-in-Nation Natural Gas Ban Overthrown by Court Ruling

The Ninth Circuit Court of Appeals ruled that Berkeley does not have the power to mandate electric hookups in new development because a federal rule preempts the local regulation.

April 18, 2023 - Bloomberg Law

Aerial view of small town of Beacon, New York in the Hudson Valley

Hudson Valley City Bans Fossil Fuels in New Construction

Beacon will require all-electric appliances in new buildings starting next year.

March 23, 2023 - Food & Water Watch

Close-up of black electric stove with red heated coil and person reaching out to press button

Study: Electric Stoves Improve Air Quality

Air pollutants in housing units that received electric stoves as part of a pilot program dropped sharply, signaling that switching to electric appliances has public health benefits as well as environmental ones.

February 10, 2023 - Next City

Close-up of signs being held up at climate change protest

Survey: Mayors Concerned About Direct Impacts of Climate Change

Almost all U.S. mayors have some level of concern about climate change in their communities, but local leaders face some challenges in taking action.

January 22, 2023 - Smart Cities Dive

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.

Top Books

An annual review of books related to planning.

Top Schools

The definitive ranking of graduate planning programs.

100 Most Influential Urbanists

The who's who of urbanism, according to Planetizen readers.

Urban Planning Creators You Should Know

A short list of voices on social, video, and podcasting platforms.