Most people I talk to support “sustainability” and “social justice” goals. Ecology teaches us that we need to frame these human aspirations in relation to the biological capacity of the earth: the energy, and resources that support our burgeoning populations and economies. < ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office">

As human society sets out to achieve ecological sustainability and social justice on earth, we face two serious challenges: One, humanity already over-consumes the biological capacity of the planet; and secondly, humanity suffers from a vast gap between rich and poor.

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A reporter from Dubai phoned last week and asked, “Can Dubai become a sustainable city?” and specifically, “could the tourism industry be sustainable?” In age of global warming and declining fossil fuels, the entire airline industry is probably not sustainable. Dubai, of course, is not even remotely sustainable. < ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office">

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