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

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:
- Planting for the Future: The Urban Trees of Tomorrow
- WHO Resource Database Links Planning and Public Health
- Planting Trees Where They are Most Needed
- The Benefits of Trees
- Regenerating and Healing Land Through Parks
- Sibling Study Highlights Impact of Green Neighborhoods on Public Health
- The Future of Federal Funding for Green City Initiatives
- Transforming Landfills into Parks
- The Promise of Urban Food Forests
- Rewilding the Golf Course
- New Documentary Highlights Regenerative Agriculture and Climate Change
- Latest Trends in Parks and Recreation
- Rochester Updating Urban Forest Master Plan
- Planning for Trees in Los Angeles
- San Francisco's Presidio Earns Fifth 'Green Flag' Award
- Tree Folio NYC Aims to Monitor Urban Forest in Real Time

What ‘The Brutalist’ Teaches Us About Modern Cities
How architecture and urban landscapes reflect the trauma and dysfunction of the post-war experience.

‘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.

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.

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.

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.

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.
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Economic & Planning Systems, Inc.
UCLA Lewis Center for Regional Policy Studies
Mpact (formerly Rail~Volution)
Chaddick Institute at DePaul University
City of Piedmont, CA
Great Falls Development Authority, Inc.
HUDs Office of Policy Development and Research
