"But even with the broader effort, the emphasis on NASA seems particularly pointed. How many people even know what the NSF stands for or what the National Oceanographic and Atmospheric Administration (NOAA) does all day? But NASA is different. Every kid knows NASA. Every parent knows NASA. NASA is cool. NASA is Superman. So, when NASA tells us that Earth's climate is changing because of human activity, it carries a lot of weight. It's a weight climate denialists have a hard time bearing up under. Honestly, when it comes to getting the science of climate change right, who are you going to believe? A radio talk show host or NASA? The angry denialists in the comments section of this blog or NASA? The politician who says, "Well, I am not a scientist" or the scientists at NASA? The answer is pretty clear."
Republicans Vs NASA Earth Science, earlier post