Celebrating World Environment Day

Commemorate the 51st World Environment Day with this curated list of Planetizen articles highlighting research and projects that promote a healthier, more sustainable world.

2 minute read

June 5, 2024, 11:00 AM PDT

By Mary Hammon @marykhammon


Bird's eye view of park with green trees, concrete walkways, and benches on lake or riverfront.

watman / Adobe Stock

It’s World Environment Day, a global celebration that has been held annually on June 5 since 1973. According to its official website, “World Environment Day is a global platform for inspiring positive change. People from more than 150 countries participate in this United Nations international day, which celebrates environmental action and the power of governments, businesses and individuals to create a more sustainable world.” This year the event is being hosted by Saudi Arabia with a focus on land restoration, desertification, and drought resilience.

In honor of this global commemorative date, Planetizen’s editors have pulled together a roundup of recent articles highlighting studies and initiatives in cities and rural communities across the United States aimed at protecting and enhancing environmental and public health.

Here’s a list of recent headlines highlighting inspiring environmental research and projects:


Mary Hammon

Mary is an editor and writer who is passionate about urban planning and the direct impact it has on people's lives and how we experience the world around us. Prior to joining Planetizen as editorial manager in December 2023, she spent eight years as an editor for Planning magazine, the flagship publication of the American Planning Association.

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I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

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Concrete Brutalism building with slanted walls and light visible through an atrium.

What ‘The Brutalist’ Teaches Us About Modern Cities

How architecture and urban landscapes reflect the trauma and dysfunction of the post-war experience.

February 28, 2025 - Justin Hollander

Complete Street

‘Complete Streets’ Webpage Deleted in Federal Purge

Basic resources and information on building bike lanes and sidewalks, formerly housed on the government’s Complete Streets website, are now gone.

February 27, 2025 - Streetsblog USA

Downtown Los Angeles skyline at sunset with new 6th Street Viaduct arches in foreground.

Downtown Los Angeles on the Rise: A Promising 2025

Fueled by new developments, cultural investments, and a growing dining scene, downtown Los Angeles is poised for significant growth in 2025, despite challenges from recent wildfires and economic uncertainties.

February 21, 2025 - Los Angeles Downtown News

Informational plaque in front of paved walkway next to tall green trees in Black Hawk State Historic Site, Illinois.

Supporting Indigenous Land Reclamation Through Design

Harvard students collaborated with the Sac and Fox Nation to develop strategies for reclaiming and co-managing ancestral lands in Illinois, supporting Indigenous sovereignty through design, cultural storytelling, and economic planning.

17 minutes ago - Harvard GSD

Lush Five Rivers Metropark in Dayton, Ohio with flowers and green trees on a sunny day.

A Plan to Expand Tree Canopy Across Dayton

Dayton is developing an urban forest master plan, using a $2 million grant to expand its tree canopy, address decades of tree loss, and enhance environmental equity across the city.

1 hour ago - Dayton Daily News

Close-up of worker installing white electric heat pump outdoors.

Decarbonizing Homes: The Case for Electrifying Residential Heating

A new MIT study finds that transitioning residential heating from natural gas to electric heat pumps can significantly reduce carbon emissions and operational costs.

2 hours ago - MIT News

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.

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