Is the world getting warmer? All sorts of anecdotal and empirical evidence, as well as what our own senses tell us, would suggest "yes." The most advanced climatological research comes up with the same answer, and places the blame primarily with the burning of fossil fuels. Against this stand a few skeptics -- some well-intentioned, many, funded by the energy industry, not -- who claim that global warming is either not caused by pollution, or not happening at all.
It's rather amusing: Look at the people who are loudest in saying that the flimsiest doubts about global warming, despite a preponderance of solid evidence, mean we shouldn't take any action to stop it. Well, guess what? These are the same "conservative" bloviators who recklessly cast aside all doubts and supported going to war on some rather flimsy evidence regarding WMDs in Iraq.
This only goes to show what a joke politics are in America these days, as ideology drives pundits into a world of make-believe, where happy little brown people will welcome American invasions with flowers and marshmallow pies. Pixie dust allows you to throw away trillions on a war while cutting tax revenue, and pollution doesn't exist if you don't think about it!