Montreal Protocol

Ozone Layer

30 Years Later—The Montreal Protocol as Essential as Ever

At least this story is about what might have been if we hadn't passed environmental regulations, instead of what will happen if we don't.

September 27, 2017 - National Geographic

Global Agreement Reached to Limit 'Super Greenhouse Gas Emissions'

An historic agreement reached by 170 global leaders in Kigali, Rwanda on October 15 to limit hydrofluorocarbons could have more of an impact on reducing climate change than the carbon emission agreement reached in Paris ten days earlier.

October 17, 2016 - The New York Times

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.