Invasive Species

Looking up at a grove of mature hemlock trees on a sunny day.

Fighting Forest Pests With AI: A Hemlock Success Story

Fairfax County utilized GeoAI and ArcGIS technology to efficiently map and protect its hemlock trees from the invasive woolly adelgid, ensuring targeted pest management and preservation of its evergreen canopy.

January 21, 2025 - ARCNEWS

View of Portland skyline with green trees in foreground.

Invasive Beetles Put Oregon Forests at Risk

Two recently discovered borer beetles could lead to a significant loss of tree canopy.

July 16, 2024 - OPB

Close-up of yellow and black goldspotted oak borer beetle on blade of grass.

Invasive Beetles Threaten California's Oak Trees

Goldspotted oak borers are damaging California's oak trees, increasing wildfire risks and causing ecological and economic losses, with mitigation focused on local firewood sourcing and tree management.

July 11, 2024 - Fox 5

Oak tree with golden hour sun coming through its leaves on a hill in the San Gabriel Mountains in Southern California.

Southern California’s Oak Trees are Under Threat

Goldspotted oak borers (GSOB) are invasive pests that are harming and killing oak trees across San Diego, Riverside, Orange, and Los Angeles counties.

June 12, 2024 - Los Angeles Times

San Antonio, Texas, Riverwalk, Evening

San Antonio Officials Remove Invasive Snails During River Walk Draining

As part of the biannual cleaning of the city's prized River Walk, San Antonio officials removed hundreds of invasive snails from the channel.

February 3, 2022 - My San Antonio

Kudzu vines growing abundantly in a field

Finding New Uses for the 'Vine That Ate the South'

Visually striking and aggressively invasive, kudzu has been choking the Southeast for decades. Now, designers, chefs, and activists want to find ways to make it useful.

April 25, 2021 - Southerly Magazine

Eucalyptus Tree

The Ongoing Debate Over California's Eucalyptus Trees

The eucalyptus is an exotic species in California, and studies suggest it has contributed to an increase in wildfire hazards. But defenders of the trees say the eucalyptus is just an ecological scapegoat.

December 28, 2019 - The Guardian

Invasive Species

Price Triples for Keeping Asian Carp Out of Lake Michigan

It's been expensive year for the U.S. Army Corps of Engineers' efforts to prevent environmental catastrophe in Lake Michigan.

December 1, 2018 - Associated Press via Chicago Tribune

Invasive Species

Invasive Fish Encroaching on the Great Lakes While Army Corps Study Languishes

Business interests are likely to clash as fisherman find evidence of the progress of Asian carp toward the Great Lakes. The Trump Administration delayed a study of the issue earlier this year.

June 23, 2017 - AP via Chicago Tribune

Modern Home

Bamboo Regulations Almost as Popular as Bamboo in New Jersey

People usually plant bamboo as a privacy screen, but it can quickly turn into an invasive nightmare for everyone else. Cities around New Jersey are passing regulations that allow the removal of bamboo if it gets out of hand.

June 23, 2017 - North Jersey

Coastal Erosion

Tiny Bugs Causing Big Problems for the Vanishing Louisiana Coast

A mealy bug is devastating the cane that holds the land on the Louisiana coast in place. Without the cane, many square miles of land may wash away.

May 7, 2017 - The Washington Post

Japanese Knotweed

One Reaction to an Invasive Plant Species: Eat It

When it comes to one particularly invasive plant species in Pittsburgh, some food retail businesses are saying, "if you can't beat it, eat it."

May 28, 2016 - The Wall Street Journal

The Incredible Climate Mitigation Potential of Compost

Research has shown that the world's largest land use, grazing, holds enormous potential when linked with composting, to dramatically reduce the carbon content of the atmosphere through sequestration while concurrently restoring degraded rangeland.

October 20, 2014 - San Francisco Chronicle

Massive Swan Kill Planned in New York

“Across millennia [mute swans] symbolized transformation and devotion, light and beauty,” says a recent article in Wired. Not so much in New York City, where the city’s population of mute swans will be reduced to zero to protect other native species.

February 7, 2014 - Wired

EPA Plots Plan to Restore Great Lakes

With heavily polluted waters and eroding shorelines, the Great Lakes are undergoing a rapid deterioration in health. The Environmental Protection Agency has unveiled a 5-year plan to restore the lakes.

February 23, 2010 - Los Angeles Times

Fighting the Invasive Species of the Galapagos: Humans

Drawn to the Galapagos Islands by their booming tourism industry, thousands of poor Ecuadorians are being booted from the sensitive ecosystem to counteract the negative impact of the rising human population.

October 7, 2009 - The New York Times

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.

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The definitive ranking of graduate planning programs.

100 Most Influential Urbanists

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

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