11 March 2016, YALE Climate Connections, Aspen 3rd City in U.S. to Go 100% Renewable. Aspen, Colorado . . . home to a winter playland of skiing, snowshoeing, trekking, and now, 100 percent clean energy. Aspen started transitioning away from fossil fuels in the 1980s with two hydroelectric dams. Then last summer, the city purchased enough wind energy to meet the last 25 percent of its energy needs – the equivalent of taking 4,000 cars off the road for a year. Aspen joined Burlington, Vermont and Greensburg, Kansas in relying solely on clean energy. David Hornbacher, Aspen’s director of utilities and environmental initiatives, says although every community is unique, each one can put together a portfolio of clean power. HORNBACHER: “We’re the third municipal electric utility in the nation to achieve this and each did it by a different route. So let’s let each of these organizations inspire others to find their path to one-hundred percent renewable.” Now Aspen’s renewable energy portfolio includes wind, water, and solar power. By using the forces of nature to power the community, Aspen hopes to inspire other communities to take action. Read More here
Category Archives: Cities Response
8 February 2016, The Conversation, In a heatwave, the leafy suburbs are even more advantaged. Summer brings out the heliophobe in many of us. It’s manageable if you live in a house that stays cool when shut up tight. It helps if you’re physically capable of crossing to the shadier side of a hot street. It’s even better if you can work from home or use public transport stops that enjoy the cover of buildings or trees. We have reason to think a lot about shade these days, especially as the heatwaves roll in. At such times, shade is our friend. On top of the existing urban heat island effect, the incidence of extreme heat events is rising. These events are also lasting longer and getting hotter. Coverage for all is a wonderful ideal, and the federal government has announced plans to set “urban canopy” targets. But, in the meantime, some communities and areas need trees more urgently than others. Shade is not only a matter of public health; it is a social equity issue. In a warming city like Melbourne, some of the most socially vulnerable people are in areas that are most exposed to extreme heat. Our pilot research in Melbourne suggests that integrated social and ecological data sets should be used to develop programs that reduce socioecological vulnerability. Shade can be a life-saver More than twice as many people perished in Melbourne during the 2009 heatwave leading up to Black Saturday than died in the devastating fires on that day. Extreme heat is a slow-motion disaster. The tendency to respond to heat as an emergency rather than planning for an ongoing chronic stress can have deadly consequences, as Annie Bolitho and Fiona Miller argue in a forthcoming paper. Extreme heat events are increasing in duration and intensity, and some parts of cities are more vulnerable than others. AAP/Bureau of MeteorologySocial and geographic isolation, age, disability and existing health conditions all play a role in vulnerability to heat. Vulnerability to urban heat also has a geography: vulnerability is compounded by where people live and whether trees live there with them. Urban authorities are using vegetation to help fight extreme heat in susceptible areas. In large sprawling cities like Melbourne, local councils are working to increase canopy cover in their jurisdictions. Urban forests can mitigate the urban heat island effect and significantly lower surface and ambient air temperatures. Read More here
3 February 2016, The Conversation, Our cities need more trees, but that means being prepared to cut some down. Planting more trees in our cities is a no-brainer, isn’t it? The federal government certainly thinks so, having last month unveiled a plan to increase the amount of tree cover in Australia’s cities. Tall trees with luxuriant canopies provide a wide range of benefits to sweltering urbanites. They reduce the urban heat island effect, take up carbon dioxide from the air, reduce wind, muffle traffic noise, help to retain rainwater, attract wildlife, improve human health, and they look nice. To take an example, Canberra’s 400,000 trees – all planted in the past century or so – now deliver benefits worth up to A$15 million per year. But trees are living things and start their urban life as small plants. It may take 50 years or more to reach their mature size and full value. So to get quick benefits, trees are “over-planted”, with many small tree canopies adding together for a significant overall effect. But this eventually leads to competition between the trees, which reduces their value, and so trees are then periodically thinned out. Such thinning is often not appreciated. The pioneering urban forester Charles Weston, tasked with turning Canberra’s barren landscape into a site fit for the nation’s newly chosen capital, over-planted for quick effect. His successor Lindsay Pryor then thinned out the trees, to help maintain the benefits, for which he was widely criticised: Read More here
14 January 2016, The Conversation, Hopes of a new urban age survive minister’s fall. The resignation of Australia’s first minister for cities and the built environment after just 99 days is a setback for federal leadership in these areas. Yet enough momentum and goodwill have been generated to keep the flag flying. The greatest hope is that an urban consciousness in national public policy will be lodged permanently. Even before state planning ministers assemble within months to hammer out the ground rules for federal engagement, the mutual understanding will be that the states are Australia’s primary urban governments. In August 1945, a conference of Commonwealth and state ministers in Canberra confirmed that arrangement. The states rejected a generous proposal for a central planning bureau to provide advice, training and information resources plus cover half the costs of employing technical experts to assist local authorities. Prime Minister Ben Chifley’s summation sealed the fate of the bold reconstruction initiative hatched by Nugget Coombs:… the matter ought to be left to the states. How cities became ‘orphans of public policy’ Regardless, the federal government has retained a periodic interest in cities, with mixed outcomes. Historically, most initiatives have been linked to Labor. Gough Whitlam’s Department of Urban and Regional Development (DURD, 1972-75) injected valuable locational and equity perspectives into policy. However, a big-spending command, control and co-ordinate mission proved problematic. Bob Hawke delivered AMCORD and Green Street as best-practice guidelines for residential development. This helped change the culture of the development industry. But the Hawke government’s main legacy, driven by Deputy Prime Minister Brian Howe, was Building Better Cities, centred on strategic housing, environmental and infrastructure projects. Read More here