The happiest state: Hawaii. The happiest city: Napa, California. This is according to a recent study of geotagged tweets conducted by researchers at the University of Vermont. The researchers sifted through more than 10 million geotagged tweets from 2011 to map out the moods of Americans in urban areas. CNN reported that the researchers ranked the locations “based on frequency of positive and negative words using the Mechanical Turk Language Assessment word list.” Happy words include LOL and haha, as well as “good, nice, sleep and wine, and food or beach-related words.” Considered sad words are mad, hate, no, boo, and expletives. According to the list, “earthquake” is one of the saddest words, while “rainbow” is one of the happiest. Researchers pointed out that in the US, only 15% of adults online use Twitter, and may not accurately represent the demographics of the US. Nevertheless, the research shows that social networks have a lot of promise for these survey types.