Professor Sarah Cornell discusses the interaction between the planetary boundary processes. Earth system interactions are complex and dynamic, so that if you change one dimension, others change in response. The mechanism for these effects are the feedbacks between land, atmosphere, oceans, and the biosphere, and examples are given of positive and negative feedbacks. In many of the discussions about planetary boundaries, we are dealing with an abstract global picture; but the consequences and causes are local, which leads us to focus on nexus approaches.
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