Let’s discuss the weather

Wondering your opinion, not particularly trying to change it:

1. How likely is our avoiding dangerous climate change by getting enough international cooperation to cut global carbon emissions enough in time?

2. How much of a difference can I make to this?

3. If the chances in 1. are small, why don’t we try something like geoengineering?

4. If 1 and 2 are small and 3 feasible  (so the world isn’t about to end), why is cutting emissions an important issue to work on? (given the opportunity costs: there are lots of other critical issues)