Produce a More Cyclical and Regenerative Metabolism
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As we approach the end of this book, we look toward some more visionary unfinished agendas for resilient cities that are also related to overcoming fossil fuel dependence. In recent years there has been a focus on the nine “planetary boundaries” that show how human activities, mostly in cities, are setting up limits to our growth. The constraints are dominated by climate change and biophysical integrity, which we have addressed so far, but the main agenda is that more focus is needed on the metabolism of our cities. How can we reduce the flow of nutrients and materials that end up in wastewater and landfill and also reduce the flow of fossil fuels into greenhouse gases and waste heat? Can cities take up the urban metabolism agenda in new and creative ways, maybe even creating a regenerative metabolism?