The key elements of scientific advancement that formed the ingredients of the planetary boundaries framework include (1) the evidence of the advent of the Anthropocene, (2) tipping elements in the Earth system, (3) the unique role of the Holocene equilibrium as the only stable state of the planet we know that can support our modern world, and (4) the deeper understanding of interactions, feedbacks and threshold dynamics among processes and components of the Earth system.
Since its original publication, the planetary boundary framework has triggered major scientific scrutiny, debate and advancements. This has resulted in significant progress in assessing the identification of planetary boundary processes and improved definition of boundary levels. It has also triggered scientific efforts of coupling global planetary boundaries with regional definitions and to deepen the analysis of interactions among boundaries. It has also triggered new integrated research on global governance and equity dimensions of planetary stewardship of a safe and just operating space within planetary boundaries.
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