Plants Do The Dirty Work

"Phytoremediation" is a growing field (pun intended) of practice that uses particular types of plants to leech toxic materials out of the soil in contaminated sites.

1 minute read

December 30, 2010, 12:00 PM PST

By Tim Halbur


The Dirt, the blog of the American Society of Landscape Architects, reports on how urban brownfields in New York City are being cleaned up using phytoremediation. ASLA quotes urban designer Kaja Kuhl, Adjunct Associate Professor at Columbia University, who found that more than 11 percent of New York City is abandoned lots:

"If glued together, these disparate, small-scale lots would be the size of Manhattan. Also, most of the sites are small: 50 percent of all vacant lots of less than 2,500 square feet and 80 percent are less than 5,000 square feet. If applied across these small sites, low-cost and highly-effective phytoremediation techniques could have a powerful impact and help ensure future urban development is really just redevelopment."

Here's a video from ASLA that illustrates how phytoremediation works:

From Industrial Wasteland to Community Park from ASLA on Vimeo.

Friday, December 24, 2010 in ASLA's The Dirt blog

portrait of professional woman

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

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

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 9, 2025 - Diana Ionescu

Green vintage Chicago streetcar from the 1940s parked at the Illinois Railroad Museum in 1988.

Chicago’s Ghost Rails

Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.

July 13, 2025 - WTTV

Aerial view of downtown San Antonio, Texas at night with rotating Tower of the Americas in foreground.

San Antonio and Austin are Fusing Into one Massive Megaregion

The region spanning the two central Texas cities is growing fast, posing challenges for local infrastructure and water supplies.

July 3, 2025 - Governing

White park shuttles with large Zion logo on side and red rock cliffs in background in Zion National Park.

Since Zion's Shuttles Went Electric “The Smog is Gone”

Visitors to Zion National Park can enjoy the canyon via the nation’s first fully electric park shuttle system.

1 hour ago - Reasons to Be Cheerful

Chart of federal transportation funding comparing Biden and Trump administration spending.

Trump Distributing DOT Safety Funds at 1/10 Rate of Biden

Funds for Safe Streets and other transportation safety and equity programs are being held up by administrative reviews and conflicts with the Trump administration’s priorities.

2 hours ago - Transportation for America

Close-up on yellow and black TAXI sign on top of beige car in central Munich, Germany.

German Cities Subsidize Taxis for Women Amid Wave of Violence

Free or low-cost taxi rides can help women navigate cities more safely, but critics say the programs don't address the root causes of violence against women.

3 hours ago - Bloomberg