He did not "blather" about anything. AFAIK never said "man-made" global warming, but said "some scientists say the planet is warming."
And his opposition to cap and trade has been clear throughout the campaign.
If you're that misinformed, I seriously doubt you ever planned to support him anyway.
He said, "I think [global warming] is a real concern and we have to find ways to reduce CO2 emissions. We need to promote new industries like carbon sequestration…to try to reduce the amount of CO2 going into the air. I’m going to accept the science that’s out there and the science says that we need to do everything that we can to reduce CO2 emissions to the atmosphere and that will help."
Sorry, but McDonnell made a pretty strong statement that he buys the nonsense. And any statement about science saying that we need to reduce CO2 is definitely blather. He didn't use the term man-made, but what do you think he meant when he spoke about "do[ing] everything that we can to reduce CO2 emissions?"
This isn't about a "pixel or two." This isn't a small matter: the global warming baloney and the policy prescriptions that are peddled with have significant impact. If you're willing to accept a Republican Party that fronts candidates that have bought into the global warming sham, that's your problem.