[ gong ] strawberry banana! [ male announcer ] for a smoothie with real fruit plus veggie nutrition new v8 v-fusion smoothie. could've had a v8. i believe based on what i read that the world is getting warmer and humans contribute to that. it is important for us to reduce our emissions of pollutants and greenhouse gases that may be contributors. >> my view is that we don't know what is causing climate change on this planet and the idea of spending trillions and trillions o of dollars to try d reduce co 2 emissions is not the right course for us. >> chris: mitt romney's apparent flip flop this week on global warming. we are back now with the panel.