Several of the neighborhood kids climbing the walnut tree in the Latona Community Garden.

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A new report ranks ten leading world cities on their greenhouse gas emissions. It also examines how and why the emissions differ.

As the report says, over 50% of the world’s population lives in urban areas. Leading cities of the world, global cities, are the places where greenhouse gas emissions really need to be cut. The greenest city from the study is Barcelona and the worst is Denver.

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A glorious car-free Market Street in June of 2008 after the queer pride parade.

I could not agree more, and am eagerly anticipating the upcoming changes; they can’t come quickly enough. Cars make us fat. The more we can increase walking, biking and mass transit use, the healthier our citizens will be, and the more livable and sustainable both our city and world will become.

As a pollutant polycyclic aromatic hydrocarbons (or PAH’s as we call them in the business), are of concern because they have been identified as carcinogenic, mutagenic, and teratogenic (not good things if you were wondering). PAHs are created as a byproduct of the burning of coal, oil, and fossil fuels. Often they are of concern in urban areas where there is a higher carbon footprint, and it forms that nice cloud of yellow smoke you see floating over some of your major cities.

Now, new research out of Columbia University is showing that exposure to PAHs, can reduce neonate’s intelligence. The study performed in New York city where PAHs are in no short demand, showed IQ scores that were 4.31 and 4.67 points lower, respectively than those of less exposed children.

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That was one of the many probing questions that the visionary former mayor of Bogotá Colombia, Enrique Peñalosa, asked a packed auditorium in San Francisco last night. How do we define what makes a good city, what is our criteria? What makes an urban environment desirable and livable, and how do we judge the quality of life? What is socially and environmentally sustainable?

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It seems strange to think that we could lose knowledge, especially in today’s world of information on demand, but if you think about it, certain skills and know how are hard to come by.

At the end of 2008, over one half of the world’s population lived in urban areas. Urban lifestyles come with their own characteristics and culture and so do rural lifestyles. Urban populations don’t have ready access to many of the experiences as rural populations do. General knowledge of where our food comes from for example, the simple act of gardening, knowing the planting seasons, identifying plants and knowing when to harvest; having the understanding of why bees are important, is not something that city dwellers grow up experiencing and knowing.

Based on this, I consider myself very luck to have grown up in a semi-rural area. I was close enough to a city but within easy distance to farms, lakes and rural towns. I learned many things because of this, both craft related and non-craft related and continue to acquire various tactile knowledge (err tacit, but I like tactile better) and I hope to never stop.

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The vehicle was introduced to the media on Tuesday at the New York Auto Show, and Segway CEO Jim Norrod described the P.U.M.A. as “…a dramatically different approach to urban mobility”:

Read the rest on the Sundance Channel’s SUNfiltered blog.

Tourism is the world’s largest and most promising industry. The concept of ‘eco-tourism’ is perhaps the most abused, little understood and least explored. Going to the mountains or a National Park and all other forms of natural tourism are often, though not always, marketed as ‘eco-tours’. While Ecotourism can be distinguished from nature tourism by its emphasis on conservation, education, traveler responsibility and active community participation, there is a severe paucity of efforts and attempts in the right direction for conducting such eco-tours.

Now, a youth led organization and an urban think tank in Delhi, India has taken to itself to research and explore ‘urban ecotourism’ as a means to connect the citizens back to their city, and raise awareness about the ‘nature in the city’. Underlying to this initiative is also the understanding that for the first time in human history, a majority of people live in cities or towns and that cities are the future of the world!

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Everyone knows the very tastiest tomatoes are homegrown, lovingly staked and watered at regular intervals until they’re big and red and ripe. Until recently, such simple pleasures were reserved for rural dwellers but the growing movement for urban farming is starting to change all that. While container gardens and green rooftops have made urban agriculture more common, a new system called a Portable Farm may take it a step further.

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An awesome Public EcoArt Project with the Metro Station in the vicinity

48° Celsius is the highest temperature that the city of Delhi, India has witnessed in its recorded history. 48° Celsius is also a reference to the exigencies of global warming - which can be felt in Delhi’s continuously escalating summer temperatures each year. Delhi, by any score, qualifies as one amongst the world’s most dynamic and complex urban settings. Like most other urban centers of this country and of the south Asian region, the city of Delhi is characterized by multi-layered historicity and multiple urbanisms that get expressed in varying conditions within its cultural and physical fabric.

With this as the backdrop, and as a combined Goethe-Institut and GTZ initiative, the 48c Public.Art.Ecology Festival was recently celebrated in Delhi. A large empty bucket, a tree hanging from a crane, a hanging garden for want of space, a crash landing, cycle-rickshaws as local story-tellers, a bamboo art, a step-well with a large inverted mineral bottle on top…Delhi witnessed it all this December!

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Last week I rode my bike to San Francisco’s City Hall to see Bill Basquin’s art show at Supervisor Ross Mirkarimi’s office; as I pedaled up through Civic Center Plaza my gut wrenched as I saw the large empty space where the beautiful City Hall Victory Garden used to be. All that is left where the native flowers, organic fruits and vegetables recently flourished is a lonely Christmas tree.

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The Watree addresses both of these issues, in a device that some would say looks like an upside down umbrella. While mechanically complex, the idea is simple - Able to be stored in a retracted form, the Watree unfurls to become a large bowl to capture rain, which is then directed to a series of storage tanks underground, ready to be processed as drinking water, or later used to irrigate land.

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A new study published in the American Journal of Preventive Medicine has found that greener (i.e. vegetation in yards, parks, etc.) inner city neighborhoods result in healthier children.

Researchers from the University of Washington, Indiana University, Purdue University and Indiana University School of Medicine followed more than 3,800 children between the ages of 3 and 16 for over two years. The predominantly African American and poor children’s neighborhoods were measured for “greenness” by using satellite imaging data of vegetation. Janice F. Bell, PhD, University of Washington assistant professor in the department of Health Services at the School of Public Health and Community Medicine, explains the results:

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Yes. It exists. GreenGraffitti, a service of Netherlands based graphic design/marketing firm Hemshaven, creates ads using three ingredients: Dirty, high foot traffic urban sidewalks, a stencil, and a high pressure water sprayer. Apply stencil to sidewalk, spray water, remove stencil, and you have a visually compelling, totally non polluting, long lasting (up to 6 months they claim) ad.

GreenGrafitti say it’s, “completely carbon neutral and contributes in a unique way to a healthier environment.” But the question comes to my mind, yes they’re not using paper, ink, PVC, etc, but what about all that water that’s used?

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Even though the residential wind power sector has seen tremendous growth over the last decade, an article in The Arizona Republic estimates that there are still only 4,000 residential wind turbines nationwide. The primary reason that wind energy has been slow to take hold is that wind turbines are fairly visible, and therefore highly controversial, installations. According to the American Wind Energy Association, small wind systems (100 kilowatts or less) need to be at least 30 feet above barriers which might break the force of the air currents reaching the turbine. Right now, the industry recommends wind turbines only for sites that are at least one 1 acre in size. Consequently, wind turbines in urban areas are still quite rare. (In a September 2007 post, earth2tech featured a San Francisco home which sports a turbine, and pointed out that this may be the first urban wind turbine in the country.)

Unfortunately, individual efforts to experiment with wind power, even in outlying areas, have encountered a lot of roadblocks. Proposed turbine installations are usually evaluated by local governments on a case by case basis, since most city zoning laws have height restrictions which would implicitly prohibit turbines. Oftentimes, even if permission is granted and a turbine is erected, neighbors unite to fight the decision. (For individual turbine projects that have made news for seeking exceptions to local codes, see these articles on Wayne, New Jersey and Atlanta, Georgia).

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The future city, Dongtan, is growing out of an island at the mouth of the Yangtze River Delta. The unique Ecocity being built on the island is also a creative way to protect the island’s ecologically sensitive wetland environment from China’s fast-paced development.

What will life in China’s first ecocity look like?

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A 200-word essay, a clever solution, and a $25 fee secure your entry into this international competition that seeks to build sustainable urban communities. Re:Connect encourages ecopreneurs to consider the role of technology in urban environments, the localization of key services, and biomimetic neighborhood design.

Register for the competition by June 1st and submit your innovative entry by June 15th for consideration. Prizes include $2,000 in cash, media promotion, and the opportunity to sustainably transform an urban landscape. While on the Re:Connect site, be sure to browse additional competitions and resources including:

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Los Angeles has a dearth of publicly owned fruit trees, but who owns the fruit they produce? The three activists behind Fallen Fruit dare to ask, “Is this my banana?” By their estimate, 22 different crops can be harvested from public land trees in the Silver Lake neighborhood of Los Angeles alone. Among these are citrus fruits, quava, walnuts and even prickly pear cactus pads, which can be turned into the Mexican delicacy, nopalitos. Their mission is to encourage city planners and officials to plant only fruit trees as part of municipal landscaping. Public funds and worker hours go into maintaining municipal land, so why not have these plants also produce edible harvest? Fallen Fruit also organizes fruit harvesting events, usually at night and usually in plastic lab coats for effect.

A less political example is the Fruit Tree Project of Vancouver - a community initiative that connects residents who have fruit trees on their property with soup kitchens and other community organizations that help eradicate hunger. The group also hosts canning workshops in an effort to encourage local eating during the winter months. The movement has an additional benefit: it is sponsored by Nelson Bear Aware, an organization that tries to eliminate human-bear conflict. It turns out, the spoiled fruit from urban fruit trees has been attracting bears for decades, exposing them to the possibility of being shot or run over.

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