But China on global warming
Second step do more as a country
Third step try to shame or encourage China and other countries into doing more
The US is still in the lead for total emissions historically and has a higher emissions per person. If it ignores it's responsibility it makes it very easy for China not to mention India or other lower total emissions countries to do the same.
China is doing something if not enough. The goal should not be trying to find a way to avoid responsibility because that's how you get all countries to avoid doing anything. The point is too keep pushing all countries starting with yours to to more