This is the continuation of a longstanding trend. Meanwhile China and the rest of the world continue to churn out more and more carbon. But we were supposed to be the ones who restricted our output? Doesn’t make much sense.
The U.S. emitted 15.6 metric tons of CO2 per person in 1950. After rising for decades, it’s declined in recent years to 15.8 metric tons per person in 2017, the lowest measured levels in 67 years.