I’m convinced this Hansen will be exposed by history as an unscientific sham.
Frst, his alarmist claims do not seem to be supported by other scientists or even by the weather.
Second, this nonsense about the US “leading” is extremely unscientific, when China and India are on track to surpass us in carbon emissions and have no plan to do anything about it. Add in the rest of the World and it’s rather obvious the US can’t do much about this and certainly not in a 4 year time frame.
Even IF this guy is an expert on climate, he is out of his league when he starts talking about geopolitics.
You are only leading if someone follows. Otherwise, you just wandered off...