A December letter claimed the U.S. was the largest human CO2 emitter but Wikipedia’s well-documented “List of countries by carbon dioxide emissions” shows that China produces the most human CO2 by far: 11 billion metric tons in 2017, over twice the U.S. 5 billion tons. Total World emissions were 37 billion tons. China passed the U.S. as largest emitter in 2005 with emissions of 6.3 billion tons versus the U.S. 6 billion. Since 2005, — the base year for The Paris Climate Agree