Impact of Media Choice on Energy Awareness

I am conducting a literature review and looking for suggested directions. Basic research question is "What effect does preferred news medium (TV vs Internet) have on one's awareness of local sustainable energy alternatives?" (I suspect an intervening variable may influence both preference and awareness, but...). This is part of an exercise in a research-methods class, so I'm doing the legwork - just appreciative of helpful keywords & ideas. "Environmental Communication" is my research focus, especially as it applies to freshwater and marine environments in north Florida. This particular bit is outside my focus, but it's a group project and they wouldn't let me dictate terms. :-)

Thanks in advance,
Joe Clark Ph.D.
student in Communication Fla State University
jsclark.net