Hartman believes the biggest challenge any city faces in pursuit of its sustainability goals is to break the cycle of the human propensity to do things the way they ’ ve always been done . “ We are reluctant to embrace change , even when we ’ re presented with amazing opportunities ,” he says . “ We ’ re using more resources than is within the earth ’ s carrying capacity which is not sustainable long term . We need to start thinking about solutions to reduce waste in all of our systems , and inspire innovation to see what ’ s really possible .”

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