US emissions are at a low, and dropping, it's the developing nations that are reaching record highs.
We're still the worst nation per capita for our emissions. We really shouldn't place so much blame on the underdeveloped countries, because our current economic system makes it so much cheaper to use non renewable resources than to use renewable resources in their factories to produce cheap goods for highly developed countries such as the U.S., so the companies are forced to continue using non renewable energy in order to continue to profit.
The problem really lies in the developed countries exploiting the underdeveloped ones.