This, and most of China's carbon emissions come from the production of goods for the rest of the world, so they're not the only ones "responsible" for those 50%.

households making more than about $178,000

So that's a household, meaning it likely is two adults working plus children. I would like to see this broken down more granularly - what percentage is due to the top 1% or top 0.01%, and is it due to investments or private jets, yachts, and recreational space exploration.