That's the biggest straw dog I have ever seen! "the United States and all its emissions could disappear tomorrow.." Well of course if you start with that premise, of course bad things would happen, but some good as well, right? For instance, the single largest greenhouse gas emitter would be gone. The biggest war engine in the world would be gone, along with many of the wars that justify its existence. But that is an artifice you use to prop up your arguments, and it is fraudulent.

I don't believe the US feeds half the world, and I think that's an outrageous statement. The US has 4.3% of the world's population. Half the world is about 3.75 billion, or nearly 12 times US population. You are saying that 3.75 billion people depend on the US for food. That is not categorically true. Also, it's beside the point, the point being, that as either the worst or second-worst polluter, if the US does nothing about greenhouse gas emissions, it's game over for the climate.