Your correct, USA is slightly higher then China in polutions as I had to google that fact... It's close, but I know being a born native of the US we are making many positive changes in just the last few years to clean up the air...California is the front running state...
The replublican party is starting to open their eyes to global warming, etc..That in it's self is a break thru....
We have the clean air act that is in affect, we have smaller programs like clean the bay, etc.. Arnold Shwarzenneger (terminator) GOV. passed a brutal bill that punishes big companies that pollute here in California, etc...Hybrids and other cleaner burning cars are being pushed for sales, etc... USA is on the move....