[cogitator]

That's funny - this is exactly what the professional Chicken Littles were hollering about in the early '70s...

In the 70s, the slight cooling was related to high quantities of atmospheric SO2 primarily from coal burning. This is a different mechanism (and I'd still like to know why he thinks this is going to happen).

[palmer]

the slight cooling was related to high quantities of atmospheric SO2 primarily from coal burning

That's a theory in some climate models, not a fact.