3. Methods
The data come from surveys responses of a National
Science Foundation funded project to “develop a systematic framework for modeling the technological, economic, environmental and social aspects of the life cycle of industrial materials, and use it for improving decision making and education across disciplines about all aspects materials use (with a focus on transportation fuels).” They survey was administered via the internet by Knowledge Networks which has the first online research panel that is representative of the entire United States population. The survey was administered to residents of Ohio, age 18 and over, and was available over a ten-day period in mid-March, 2009. Of 859 individuals sampled, 537 completed the survey (62.5% completion rate) .