. >>> topping obama's list of experts is dr john halled ron director of the office of sign and technologiesan met with him steps from the oval office. >> what we are facing is human-driven changes in the global climate that are producing more hot day, heatwaves, extreme downpours and wildfires and droughts. sea level is rising. the ocean is acidifying because it absorbs excess carbon dioxide that humans added into the ocean >>> on republican hill the leader of the senate and public works committee disputes that idea. >> the cleaning is changing and always has. >>> he led a 98-1 vote declaring that climate change is not a hoax. >> the hoax is people are so arrogant that they think they have the power to change climate. that is the ho., not the fact that -- hoax not the fact that climate is changing. "techknow" invited that senator and the other senators from the environmental committee to appear. all declined or did not respond. >> first of all, it's interesting that senator inhough argued only god could change the climate and not long after the pope issued a statement saying the human impac