Thresholds

PB_FIG33_upgraded_mediaBLANK_11jan2015The Stockholm Resilience Centre has a paper in Science that updates their work on planetary boundaries.  “The planetary boundaries framework defines a safe operating space for humanity based on the intrinsic biophysical processes that regulate the stability of the Earth System.”  Of the nine planetary boundaries, the scientists reckon that four have now been crossed.  Does this mean we’re dead?  Not necessarily.  The lead author, Will Steffen, says “Transgressing a boundary increases the risk that human activities could inadvertently drive the Earth System into a much less hospitable state,…”  We’ve heightened the risk.  There’s quite a bit more here on the updated findings. Continue reading


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