The problem with knowing a few simple things about the Earth system is that there is always a dynamic, deterministic chaotic planet of unknowns out there.
The problem with chaos is catastrophe – in the sense of Rene Thom.
“Technically, an abrupt climate change occurs when the climate system is forced to cross some threshold, triggering a transition to a new state at a rate determined by the climate system itself and faster than the cause. Chaotic processes in the climate system may allow the cause of such an abrupt climate change to be undetectably small.” NAS Committee on abrupt climate change 2002
Regardless of what you think you may know or not know about Earth system science – the rational response is the same.
“This pragmatic strategy centers on efforts to accelerate energy innovation, build resilience to extreme weather, and pursue no regrets pollution reduction measures — three efforts that each have their own diverse justifications independent of their benefits for climate mitigation and adaptation.” Pragmatic Climate – Breakthrough Institute
One thing I know is that in the order of 100 billion tonnes of carbon is much better restored to soils and ecosystems than in the atmosphere – for a much more inspiring purpose.