Anthony Leiserowitz is a human geographer at Yale University who studies public perceptions of climate change. He has particularly examined perceptions within the United States, where people are considerably less aware of climate change than in other countries. In the U.S., awareness of information about climate change is heavily influenced by emotion, imagery, associations, and values. Their public discourse reflects a lack of understanding of the science involved in climate change and little awareness of the potential for effective responses to it. Source: Wikipedia (en)