Conversation

The IPCC says* it’s unequivocal that humans are responsible for global heating and our GHG emissions are responsible for 100% of the recent warming.

Preindustrial atmospheric CO₂ was ~280 ppm and now it’s >420 ppm, so we’re responsible for 33% of what’s in the atmosphere (not 3%).

*When I say “the IPCC says…”, that’s shorthand for “some of the world’s best scientists volunteered years of their time pouring over tons of peer reviewed publications and summarized their conclusions to say…”.