Personally I think Global warming is a natural thing for the most part. You can't put stoppers in volcanoes, and other nations/countries don't have the modern conviences we have so their regulations are practically non-existant.
Regulating the USA is one thing, but we can't regulate what goes on outside the USA and I seriously doubt the USA is the most polluting country around.
**Just a side note here:
Here in S. California the cry for more water is common place...we have a whole friggin' ocean that we can use, just desalinate the water....but instead the polictians and people just don't see it and instead continue to grab from the Colorado river as if it were a never-ending river of life. Sadly even with the drought years many have endured, the water levels in rivers and lakes is way down.
If anyone can come up with a better solution than desalinating water, I'd sure like to know it.