
The Züri-Sack, the only officially approved waste sack in Zürich since 1993. Copyright: ERZ Entsorgung + Recycling Zürich. Photographer: Zeljko Gataric

WWF headquarters in Zeist, courtesy of Frans Sellies, Flickr

http://www.flickr.com/photos/dacitydrifter/2324800833/

Image:thebristolkid December 30, 2008, Flickr, Creative Commons

Image: Troels Heinen/City of Copenhagen

Save water, 7 Jun 2006, By Squink, Flickr, Creative Commons

Garbage, Cambodia, 29 sept 2007, By jparachute, Flickr, Creative Commons

Vienna biomass power plant, courtesy of ÖBf-Archiv/ SWH

BIke-City housing project, play area in yard, Courtesy of building developer GESIBA

Illustration of hydrogen community, courtesy of Bass Baltic Sea Solutions

Summer Cycling in New York City, photo: NYC Department of Transportation

Bikes and buses, photo courtesy of Henry Grabar Sage

Moving bicycles into the realm of the ordinary, photo by Sarah Armitage

Bicycles outside one of Copenhagen's metro stations, photo by Sarah Armitage

Girl at lake in Växsjö, Flickr Creative Commons

Freiburg - Vauban, 17 June 2008, by Carnotzet, Flickr Creative Commons

Vancouver skyline by BratoDB, March 25 2007, Flickr Creative Commons

iStock Photo

New York bus, 2004, By Malene Freudendal-Pedersen

On the former site of the Royal Porcelain factory, developers have preserved reminders of the area's history--here the classic Royal Porcelain floral pattern on the doorframe--as a means of creating place-based identity. Photo by Sarah Armitage.

Torraca enlightened by LED lights. Photo by Filadelfio Cammarano, courtesy of ELETTRONICA GELBISON ©.

St. George Street, in courtesy of Brown + Storey Architects.

Food show at Todmorden school. Courtesy of Incredible Edible Todmorden, 22 June 2009.

Michael Braungart, http://www.flickr.com/photos/calclid/1752285801/

Children of Victoria Park Primary School. Courtesy of Tipton Litter Watch

Wuxi Tian Yi. Photo by Adam Mørk copyright, courtesy of SHL.

Vindmøller, July 29, 2009 by fotos de jctopfoto

Sustainable Cities Talks, Danish pavillion at Venice Biennale, 12 September 2008, foto DAC

Image: Romses Architects

By: Johndal sep. 6. 2008, floods in morpeth uk, Flickr Creative Commons

http://www.flickr.com/photos/otispics/2260850521/

The layout of the EcoArchWiki is simple and logical. Illustration courtesy of EcoArchWiki.

Image: andreasnilsson1976, April 17, 2007, Flickr, Creative Commons

Sunflower 10094 by Rs3, Wikipedia, Creative Commons

Roof tops and ’ventilation lanes’ of Stuttgart, courtesy of Stuttgart Municipality

http://www.trendhunter.com/photos/30483

Berlin children playing in an open space in the city, 4 Dec. 2007, By Henning Thomsen

Photo by ohad, at Flickr, Creative Commons

Singapore down town china town, 23 Nov 2006, By Strange Ones, Flickr, Creative Commons

National Day celebration at Hong Wen School. Photo by martywindle August 6, 2009, Flickr Creative Commons

Marina Barrage, courtesy of PUB, Singapore's National Water Agency ©

http://www.flickr.com/photos/10278546@N05/2509791109/

Radish in baskets, Johnny Hunter, 26 May 2007.

Offshore wind turbines at Samsoe, By Samsoe Energy Academy

Australian fire danger, 5 Feb 2007, By OzBex, Flickr, Creative Commons

Geothermal borehole house, 14 Mar 2008, By Lydurs, Flickr, Creative Commons

iStockphoto

Illustration by Shira Golding, April 29 2009, Flickr Creative Commons

Paimio Sanatorium with the surrounding Finnish forests. Photo by stgoweb, Flickr Creative Commons

A new district planned for Copenhagen, photo by Sarah Armitage

Illustration of Stige Island, courtesy of Birgit Bjerre Laursen, Municipality of Odense.

Illustration: Juul & Frost, courtesy of Odense Municipality

http://www.flickr.com/photos/phoenixation/3060474889/

Fish, By VictoriaPeckham, Flickr, Creative Commons

Rooftop garden in Greenpoint, Brooklyn. Photo by Elkin, August 1 2009, Flickr Creative Commons

Placing turbines in NYC's East River. Photo taken by Kris Unger of Verdant Power Inc.

Walk the high line, courtesy of Jesper Nørgaard Pagh

Water Towers New York City, 29 Sep 2007 by TheBigSpot, Flickr Creative Commons

Old trees from Vesterbro get new life in Ørestad City Park. Photo by Ole Ziegler, courtesy of By & Havn

Image: andreasnilsson1976 July 1. 2008, Flickr Creative Commons

Kibera shanty town 7 June 2007 By genvessel, Flickr, Creative Commons

Copenhagen commuters can bring bicycles on S-trains, free of charge; photo by Sarah Armitage

Montreal, Flickr Creative Commons

Ulrich Knaack and Kim Herforth Nielsen. Photo: Fredrik Gyllenhoff

Heron at Boondall Wetlands, 5 Jul 2008, By Richard Fisher, Flickr, Creative Commons

Coventry City Council watercolour, February 26 2009, Flickr Creative Commons

Desert, iStock 000004527064

Illustration of Macintosh Village, top left is The Green Building. Courtesy of Taylor Woodrow, Terry Farrell & Partners

The townscape of Bo01. By Free Range Jack 15 November 2007, Flickr Creative Commons

Herbert Girardet, photo by Hinrich Franck

Richard Burdett, foto courtesy of Realdania

George Monbiot, http://www.flickr.com/photos/ekkaia/

View from Palacio de la Prensa, march 5, 2008, by cesarastudillo, Flickr Creative Commons.

Bycycle station, Lyon, 27 Oct 2005, By Frederic Bonifas, Flickr, Creative Commons

The roof of Lewisham Town Hall has been planted since April 2009, courtesy of Dusty Gedge, LivingRoofs

Tomatoes in London,Photo by Nick Saltmarsh, November 2008, Flickr, Creative Commons

London Olympic Park Sign 4 June 2008 by Ben Scicluna, Flickr, Creative Commons

Henning Thomsen

Algae, photo by Xalamay, July 2007, Flickr Creative Commons

Lewisham Park, 5 Nov, 2007. Courtesy of Ewan-M, Flickr Creative Commons.

London bus by E01, Flickr Creative Commons

Kawasaki City, 6 April 2008, By Tsuchiya Yoshihiro, Flickr, Creative Commons

Urban gardening in Johanneburg, courtesy of The Berkana Institute

Children in fountain water, By Henning Thomsen, Sustainable Cities

Jubilee Park lake in Jamshedpur, 26 Oct 2007 by Keki Malegamwala, Flickr, Creative Commons

City traffic - bus, car and pedestrians 7 July 2006, by Alex S Flickr Creative Commons

Photo: Silverb by me maya, June 17 2006, Flickr Creative Commons

Image: lambchops 30 September, 2007, Flickr Creative Commons

Bølling Sø seen from the sky, courtesy of Torsten Sand Christensen from Aiolos Luftfoto.

Diverse housing in Ijburg. Courtesy of www.hamperium.com Copyright © 2008.

Photo by Malene Freudendal-Pedersen

Children looking at a model of Solhuset, photo courtesy of Hørsholm municipality.

School children working in the vegetable gardens, courtesy of Haver til Maver, Thomas Nielsen.

Hoogvliet architecture, 11 April, By Jager Jansen Achitecten, Flickr Creative Commons

Hong Kong Mid Levels Escalator at Rush Hour. 5 May 2008, Photo by goosmurf, Flickr Creative commons, photo # 2467438696.

Image: moriza, May 19 2006, Flickr Creative Commons

Wet Wood, August 18 2009, courtesy of Anders Ademark, Flickr.

The Dalmannkai. Photo by Daniel Barthmann, courtesy of HafenCity Hamburg GmbH

http://www.flickr.com/photos/larod/399152781/

http://www.flickr.com/photos/cmmorel/162314926/

Central Park, New York, 1. Sept. 2008, By Ed Yourdon, Flickr, Creative Commons

Göteborg, 15 June 2008, by eva the Weaver, Flickr Creative Commons

MovingSchool, courtesy of MovingSchool.org

Foto: Fabio Aro, Flickr Creative Commons

Foto: Hausenberg, Study trip in Sluseholmen

Organic waste, courtesy of Frankston City Council

The top of the Commerzbank Tower overlooking Frankfurt, April 22, 2007, by Chaouki, Flickr Creative Commons

Bananas, dates and garlic, 26 Aug 2005, By CharlesFred, Flickr, Creative Commons

Foto: Eva Bjerring

bjornmeansbear, February 21 2009, Flickr Creative Commons

Cracked soil, 24 Dec 2006, By Andyrob, Flickr, Creative Commons

http://www.flickr.com/photos/seandreilinger/474751797/sizes/m/

Grazing cows, 13 Jun 2008, By Law keven, Flickr, Creative Commons

Illustration of the proposed eco-city Dongtan, courtesy of Arup

Crane with garbage at Vestforbrænding, courtesy of Vestforbrænding

Woman harvesting rhubarb in the urban gardens in Ørestaden. Courtesy of Ole Ziegler, By & Havn.

A bike in Copenhagen, March 23, 2008, by Kai, Flickr Creative Commons.

Future Copenhagen district Nordholmene, courtesy of COBE

Blue areas of lime mortar and marble plastering on the gable of Dannebrogsgade, Vesterbro. Courtesy of CityGardenNetwork.

Copenhagen harbour bath by Esben Bruun, courtesy of PLOT

Inside of the Gasometer, 15 april 2009, courtisy of JJW arkitekter

Excerpt from the FacetheClimate.org website, courtesy of Face the Climate.

Windmills at Middelgrunden, Copenhagen, 5 August 2007, By Andjohan, Flickr, Creative Commons

http://www.flickr.com/photos/cactus23/2282537983/

Climate World Cup, courtesy of DanWatch.

Rome, 7 July 2007, By Henning Thomsen, Sustainable Cities

The Marble Church, photo by Sarah Armitage

Chicago, Reflections by terren in Virginia, 20 Feburary 2008, Flickr, Creative Commons

Park in Chicago, Photo by Robert S. Donovan, May 2008, Flickr, Creative Commons

Caracas City slum 28 April 2005 By procsilas, Flickr, Creative Commons

Las Vegas slot machines, 10 Jan 2008 by http2007, Flickr Creative Commons

Garbage Area of Ezbet El Nakhl; taken by Creap, May 9 2005, Flickr, Creative Commons, Photo # 13067241

Photo: Henning Thomsen

Slow food, By Thera, Flickr, Creative Commons

View over Boulder, by Molas, 3 march 2007, Flickr Creative Commons

Bogotá city, Transmilenio transitpoint, 25 May 2008, By S2RD2, Flickr, Creative Commons

Photo: Fredrik Gyllenhoff

Photo courtesy of Henry Grabar Sage

Photo by andreasnilsson1976, November 16 2006, Flickr Creative Commons

Model of rainwater harvesting at Potsdamer Platz., Atelier Dreiseitl ©

Beware the litter wardens, 18 July 2008, By thejeton, Flickr, Creative Commons

BedZED, March 2007, photo by Tom Chance and BioRegional

Port Forum, Barcelona, by Luca Vez, 24 feb, 2009, Flickr Creative Commons

Barcelona, by MorBCN, Flickr Creative Commons

Green stormwater channel in Augustenborg, Photo by City of Malmö, malmo.se/sustainablecity

Allotment garden in Århus. Lars Kloster Silkjaer, June 24, 2007, Flicr Creative Commons.

Amsterdam Bijlmermeer, courtesy of Juul Frost Architects

Townhouses, courtesy of Urban Ecology Australia

Bangkok Interstate, 2008, by Julie Abitz

http://www.flickr.com/photos/83575265@N00/2534037593/in/pool-350