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This Blogspace is a collective of writers and is devoted to conversation about cities as ecological spaces…about the nature of cities.

"Edible City is a fun, fast-paced journey through the Local Good Food movement that's taking root in the San Francisco Bay Area, across the nation and around the world. Introducing a diverse cast of extraordinary and eccentric characters who are challenging the paradigm of our broken food system, Edible City digs into their unique perspectives and transformative work, finding hopeful solutions to monumental problems. Inspirational, down-to-earth and a little bit quirky, Edible City captures the spirit of a movement that's making real change and doing something truly revolutionary: growing the model for a healthy, sustainable local food system."

"United Nations Secretary-General Ban Ki-moon has said that the battle for global sustainability will be won or lost in the world's cities. Cities and urban areas are estimated to account for 80 per cent of global greenhouse gas emissions, and more than half of the world's population live in them, so what we do in our urban centres will, to a large extent, define the future of our world. Governments are struggling to agree on action against climate change, but thankfully many city authorities are just getting on with tackling the problem as best they can. Element takes a look at what authorities in Auckland, Wellington and Christchurch are expecting, how they are trying to minimise the damage and preparing for the worst, and how their plans shape up against those elsewhere."

"Playing Out is a UK initiative to close streets temporarily for motor traffic in order for children to play outside. The City of New York has a Play Streets initiative which has regular (weekly or more!), scheduled road closures all across the city for children to play."

"Los Angeles became the biggest city in the country to ban free plastic bags in grocery stores following a city council vote Tuesday. The 9-1 vote supports a ban that will take effect Jan. 1 for large stores, City News Service reported. Under the law, shoppers will have to tote their own bags, or pay 10 cents each for paper bags."

"The City of Sydney is embarking on the construction of Australia's largest rooftop solar installation, following an announcement of a plan to install a 1,250KWp (kilowatt peak) solar photovoltaic system across 30 rooftop sites within the Sydney city boundary."

"Get out and about in the city to discover some of the best Green Star-rated icons. The Sustainable Melbourne Walking Tour is a self-guided, street-level exploration of some of Melbourne's greenest buildings. Walk the city while learning how green buildings are contributing to the sustainability of the inner-city community and leading by green example in the design and construction of our built environment."

"Fast, efficient and individualistic, the bicycle is no ordinary mode of transport. It's a church, a gym, a community creator, a cash printer, a protest placard, a dopamine generator, a mechanical expression of self-determination, an icon of hope. It is touchable, attainable freedom. It is also a tool for nature conservation and one that the City of Cape Town-indeed, any city-stands to benefit from."

"The Yarra Energy Foundation and The City of Yarra invites everyone who lives, works, studies or volunteers in the City of Yarra to seize power through the Yarra Project Zero to achieve zero carbon living, learning and earning by 2020."

"In 2008, the City of Yarra set a target to be carbon neutral by 2020. Not just council headquarters - the entire inner-city municipality. But how does a whole district go carbon neutral? It can't rely on government subsidies, or an unforeseen technological breakthrough, says Alex Fearnside, chief executive of Yarra Energy Foundation, the organisation established in 2010 to make it happen."

"Pioneering 'FoodPrint Calculator' helps cities understand the environmental impact of their population's diet, and how to reduce it."

"The interactive maps allow you to zoom in or out, to select a specific mode of transit to examine, and provides a color-coded key as well as roll-over notes that will give you an idea of the percentages of people using that method of travel. Play with the maps of these cities to learn about the transit habits of people in your area. Or, if you're planning on relocating, see if one of these cities accommodates walking and biking to work or if cars rule the roads. There are many ways these interactive maps offer information: we hope they give you some interesting insights!"

"For the first time ever, today's energy system can be experienced within a browser game. In POWER MATRIX Game you build your city and supply it with the perfect energy mix. If you turn out to be a good power manager, your city will be wealthy and grow in a clean environment. Install assets, trade power within your community, do research for new technologies, and make your way up in the POWER MATRIX Game global ranking."

"The United States has seen quite the bike boom over the last decade or so, and it doesn't look to be slowing down anytime soon. According to the Christian Science Monitor, bike commuting grew by 47% nationwide between 2000 and 2011. Unsurprisingly, it was Portland, Oregon that took the lead with 250% growth, followed by Washington, D.C., San Francisco, Boston, Seattle, and New York City. Still, only 1% of Americans are biking on the regular, compared to 26% of people in the Netherlands, 10% of Germans, and 19% of the Danish population. The growth in the United States is of course still positive, and a great indication that there will be widespread public support as more cities begin to integrate cycling into the transportation grid."

There are emerging radical technologies that have the potential to change the way we live. This video on Zero Emission Cities is third summary of a series of conversations had at the NETS Annual Foresighting Event on Three Technologies that Will Change the Way We Live. The video is made by RiAUS.

Asphalt paving was removed and replaced with "structural grass," rigid plastic honeycomb cells sprinkled with ordinary lawn seed and nurtured into green swaths. Concrete strips were embedded on two sides, creating a durable driving surface. Permeable brick pavers were installed in driveways and at the lane way entrances; these allow rain water to infiltrate between their joints and into the ground, reducing  run-off, the bane of municipal storm sewer systems. The effect is both practical and pleasing to the eye. No more cracked and potholed pavements. Traffic on the countrified lanes continues, but motorists must slow down to navigate the concrete driving strips. The grassed lane ways are cooler than asphalt in summer and they don't emit the dreaded "off-gassing." They have also passed the test of time; they still look fine, almost bucolic.

Amsterdam is trying to keep its hordes of bikes under control. In a city of 800,000, there are 880,000 bicycles, the government estimates, four times the number of cars.

"The Yarra Energy Foundation is a non-profit organisation solely dedicated to making the City of Yarra carbon neutral by 2020."

"On 9 May 2013 The National Sustainability Council presented Sustainable Australia Report 2013 to Minister Burke. The report provides a picture of Australia - what we look like and who we are. It tells the story of how we have changed as a nation over the last 30 years. We have made great progress in many areas. Australians are living longer, our health and levels of educational attainment have improved. We have benefited from a strong economy, with low unemployment and increasing incomes. However, inequality has increased and the health of our natural environment has continued to decline in some key areas. The report provides an evidence base for decision-making and planning about the future. It highlights a number of trends in Australia and the world that are set to have a significant impact on the next generation of Australians. We need to plan for an ageing population, rising health costs, growing cities and changes in traditional work and family roles. The National Sustainability Council intends to use the report, the first of its kind in Australia, as a starting point for a national conversation about our future."

"In the 1960s, cars were threatening to displace bicycles in the main Danish cities. But the oil crisis, the environmental movement and a couple of controversial road projects reversed the trend. This is however just part of the story behind why Danes still cycle so much."