Pollution:
as much as we like to criticize the EPA, look at China and SE Asia: people ride their bikes wearing face masks. I seen pictures from Beijing hi-rise condos where you can not even see your own hand sticking out of the window. The waterways are pretty scary too.
US is fairly clean pollution wise but we gotta compete with China and others who don't go by the same rules, so we gotta find some kind of a balance...we can't be the 'good guys' and let them run as over.
About climate change: I don't know... but I do care about pollution