The sky is falling!!!
Yes, yes, and it will actually fall if you don’t give us your (or your neighbor’s) money!
The thermal effect of CO2 levels off at ~400PPM, which is where we are now. Increasing levels will improve almost all food productivity.
The Gulf stream has always been a bit of a mystery. And, saying that “we must save it” is like praying to some golden idol cause Crazy Harry is foaming at the mouth again and speaking in tongues. Get a grip.