Air Quality Index

View of downtown Los Angeles, California through orange haze.

Lawmakers Call for Improved Air Quality Monitoring in LA Following Fires

Wildfires like those in Los Angeles that destroy urban structures release toxic chemicals, including lead, into the air.

February 5, 2025 - Los Angeles Times

Air pollution is visible in the air around high-rise buildings in Dhaka, Bangladesh.

Air Pollution World’s Worst Public Health Threat, Report Says

Air pollution is more likely to take years life off the lifespan of the average human than any other external factor, according to a recent report out of the University of Chicago.

August 31, 2023 - Phys.org

Wildfire

Wildfires in the West Are Climate Change Lessons for Everyone

The wildfires burning throughout the West, with terrible but photogenic consequences, come with a reminder that it's only going to get worse unless massive changes are made right here in the United States.

September 13, 2020 - James Brasuell

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.

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.