The Great Acceleration, post WWII humanity forcing the earth system, is charging ahead at exponential speed, including record temps year-after-year-after year-after year and on and on it goes, relentlessly.
Fatally, many parts of the world become uninhabitable with a 2°-4°C increase in temps, too hot for human physiology. Under the circumstances, the human body cannot get rid of bodily heat fast enough. People die. Will worldwide average temps increase by 2°-4° and if so, how fast? Nobody knows for sure, but the outlook is lousy.
We need to understand that we are in a nonlinear exponential phase… we have overwhelming scientific evidence that humanity now faces a new juncture of grand global risk. We have in just five decades transitioned from being a small world on a big planet where we could allow ourselves to have unsustainable economic growth without Earth sending any invoices back to humanity up to now with overwhelming scientific evidence of a new big world on a small planet. We’ve reached the saturation point. We’re hitting the ceiling of the biophysical capacity where we can no longer exclude destabilizing the entire earth system.
Ergo, the overriding risk is a complete breakdown of the earth system, ecosystem collapse. In that regard, traversing from a linear to an exponentially charged earth system is risky and could be fatal. Here’s how Johan Rockström describes the impact of the new exponential biosphere, speaking from the World Economic…