Frank Biermann

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S cience assessments indicate that human activities are moving several of Earth’s sub-systems outside the range of natural variability typical for the previous 500,000 years ( 1, 2). Human societies must now change course and steer away from critical tipping points in the Earth system that might lead to rapid and irreversible change ( 3). This requires(More)
Cities are rapidly increasing in importance as a major factor shaping the Earth system, and therefore, must take corresponding responsibility. With currently over half the world's population, cities are supported by resources originating from primarily rural regions often located around the world far distant from the urban loci of use. The sustainability of(More)
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