The Biggest Economic Opportunity of This Century

For all of you investment junkies out there, an article from the Motley Fool on how to best invest in "cleantech" industries, i.e., renewable energy industries. I like the "cleantech" phrase. It is the sort of phrase that is marketable, catchy, straightforward, approachable, and last but not least, tangible. By now the phrase, "renewable energy" is familiar to me and to people familiar with the industry, but perhaps a lot of people out there find the term "renewable" difficult to wrap their minds around. Do people really care that energy generation is renewable? Or do they just care that it is some clean technology? Would people (when hearing the particular phrase) be more likely to invest in the cleantech industry or in the renewable energy industry? I'd like to see a focus group on the phrases "cleantech" versus "renewable energy."