If you haven't come across this Nature piece yet, it's must-reading. "Evidence is mounting that tipping points could be more likely than was previously thought... we are in a climate emergency." Also, a devastating blow to William Nordhaus. nature.com/articles/d4158…
"Some economists have suggested that 3 °C warming is optimal from a cost–benefit perspective. However, if tipping points are more likely, then the ‘optimal policy’ is that warming must be limited to 1.5 °C. This requires an emergency response."
"If damaging tipping cascades can occur and a global tipping point cannot be ruled out, then this is an existential threat to civilization. No amount of economic cost–benefit analysis is going to help us. We need to change our approach to the climate problem."
"The stability and resilience of our planet is in peril. International action — not just words — must reflect this."
