Our common perception of a graffiti artist is a vandalistic rebel who works through a free venue to spread his message. Although there are many incredible artists who sprinkle our streets and alleyways with colorful, astonishing work, they don’t expect much respect from the common passerby for the work they do- until recently. The public environment, as it always has been, is a venue for artists and people to speak out. Recently artists have used graffiti (or the notion of graffiti) to stimulate thoughtful movement through our public space by addressing topics such as climate change, pollution, and consumerism.

The UK’s Paul Curtis, also known as the "Moose," and Brazil’s Alexandre Orion are taking a new approach to graffiti to convey a sense of "clean," and to inspire pedestrians to keep it that way. Their cue comes from the "Wash Me" message commonly wiped away from the back of dirty semi trucks. They call this reverse graffiti, and they create their work by removing soot, sludge, carbon from exhaust, etc., from the wall to reveal a message.

Moose generated a message in a transport tunnel that reads "Go Gently" to remind drivers of the impact their cars have on the planet. "Once you do this, you make people confront whether or not they like people cleaning walls or if they really have a problem with personal expression."

Orion created a work in a Sao Paolo transport tunnel; his is a series of skulls that also depicts the impact drivers’ emissions have on the planet. As a result of this project, the transit authority washed the wall to remove the public expression. In reaction, Orion created the same artwork on the other side of the tunnel. This resulted in the transit authority cleaning the entire tunnel on both sides. They then continued to resist the public work by cleaning every transport tunnel in the city. Not such a bad idea on all accounts.

Another artist, Edina Tokodi, recently created a work of green graffiti in Brooklyn, New York. Edina saw the idea of graffiti as an opportunity to stimulate positive green thoughts and encourage city dwellers to resurface their connection to nature. She decided to maintain the venue while changing the medium. Her work consists of moss installations adhered to the wall where spray paint might commonly be seen. Using this much less harmful medium, she creates images such as prancing animals, and uses existing imagery to create trees and objects found in nature. The beauty of this medium is that it can continue to grow. As moss receives water from the air, condensation, and rain, it continues to grow as the artwork remains fixed to its site.

This November 7-9, Chicago will host the largest GreenBuild Expo in history. Put on by the USGBC (United States Green Building Council), this year over 18,000 attendees will gather to learn about the trends in green construction and get inspired about future projects. In a city aiming to be the greenest, this is a monumental event. On top of it all, GreenBuild will be held in one of Chicago’s LEED certified facilities, the McCormick Place West Building.

According to the USGBC, "Chicago mayor Richard Daley has pledged to make Chicago the most environmentally friendly city in the world. Building on its legacy as a center of American architecture, Chicago was one of the first cities to adopt LEED. Today it has the most LEED projects of any city in the world."

Included in the Expo is an international conference with headlining speakers such as Paul Hawken (author), Sadhu Johnston (Chicago Commissioner of the Department of Environment),  Thom Mayne (Founder and Principal of Morphosis), Maria Atkinson (Global Head of Sustainability at Lend Lease), and former US President Bill Clinton. USGBC President and CEO Rick Fedrizzi on is especially excited about Clinton’s planned appearance:

"This is an unprecedented opportunity for our green building community to hear from one of the greatest philanthropic and environmental leaders of this century. The William J. Clinton Foundation is facilitating a series of global action plans that are addressing some of the most intractable problems of our times — AIDS, economic sustainability as a way to eradicate poverty, the elimination of childhood obesity. His framework has shown the power that groups of individuals have to effect real change."

"Reducing the C02 emissions that lead to climate change is another key area of focus, and it’s being addressed by the Clinton Climate Initiative, with green building as a cornerstone of that effort,” Fedrizzi noted. “We are making a difference, and President Clinton’s unique ability to inspire individual action will add incredible momentum to this important work."

The event has a full schedule of networking and educational opportunities. Whether you are a homeowner, a builder, designer, architect, engineer, and, heck, even a programmer or a banker, there is something applicable to everyone’s life. With over 850 exhibit booths displaying the newest products and technologies, the expo itself will be an educational and eye opening experience. If you leave thinking, "I still can’t do it," then you didn’t pick up enough tools while in attendance.

Devils Lake installation: image courtesy of Green Museum

There is a little family of asexual plants commonly known as duckweed, and otherwise known in the botanical world as lemnaceae. These smallest flowering plants are lean, lime-green, clean, eating machines. Lemna is the most common of this family, and has quite a profound impact for its size. Each plant has one paper thin leaf the size of the tip of an eraser. They thrive in freshwater lakes, streams, and ponds high in nitrogen, ammonias, and phosphorus. As they feed on these “excess nutrients” the tiny plants help remediate the water on which they live atop.

Though these lime-green plants are tiny, there is no need to call them fragile. They can grow in full sunshine or dense shade, and they endure a challenging range of ph levels. They hibernate during the cold months at the bottom of their watershed and, come May, the plant “springs” up and gets to work cleaning its ecosystem. This tiny plant has been known to cover bodies the size of football fields in just a couple months. It goes unsaid that these tiny soldiers are friend and not foe when it comes to water remediation.

When artist and engineer Viet Ngo established a company back in 1983 called Lemna International that applauds and utilizes the capabilities of these mini soldiers, we weren’t surprised. Ngo, a first-generation Vietnamese immigrant, and his colleagues got a little fame when they designed a carefully engineered art installation in 1990 on Devils Lake, ND. Funded by the EPA, they designed and implemented the beautiful 50 acre, 9 channel, intestine-like system that extracted all detrimental phosphorus, nitrogen, and algae from the wetland before the water reached a bay of Devils Lake. This $50 million project encouraged the group of designers, artists, and engineers to combine the profoundly simple yet complex water remediation technology with other environmental infrastructure problems to clean up the earth. Over 25 years later, the company is managing its success with innovation, consciousness, and integrity.

Lemna International designs environmentally responsible and economical wastewater treatment technologies that naturally clean our polluted waterways. They design for everything form dams to freshwater remediation to drinking water treatment plants, pipelines, and distribution systems. Based in Minneapolis, MN the company has designed and implemented over 300 projects in 16 countries.

The company does not stop at only providing us with clean water. They make sure our water stays clean by removing any harmful waste and either safely putting it in landfills built to international standards, or incinerating it to generate electricity and heat in facilities equipped with air pollution control systems. Their impressive profile of clients ranges from industrial food manufacturers and tire plants to hospitals. They additionally serve a number of cities worldwide.

As the company gained momentum with their patented water remediation technology, they have branched out into additional sectors of environmental infrastructure including transportation, alternative energy, and general infrastructure. Like the lean, lime-green, clean, machines that duckweed are, Lemna International is actively seeking to fix any environmental problem a private or public client might have with an ingenious and unique solution!