I personally think it is a myth brought up by the governments to "assist" people to use less energy, now maybe there is something that is happening globally that is of atmospheric concern. I personally have been noticing lately a few changes in weather lately, it has been later and warmer, and earlier and cooloer, then it can be hot,rainy, and humid the next day afetr.
So if the question is do you think there is something going on, and changes are happening in our worlds weather then my answer is yes there is, but I have no reasons or facts to relate it to Global Warming.