Shelton Group's fourth annual Energy Pulse study found that while more consumers are becoming knowledgeable about renewable energy, one-third erroneously think cars and trucks are the No. 1 cause of greenhouse emissions. Only 4% cite the actual primary culprit: coal-fired electric plants.

The study also asked consumers which activities or purchases would result in the greatest reduction in their energy bill. Respondents' top three answers included:
    Install energy-efficient windows (15.5%)
    Install a higher efficiency heating or cooling system (14%)
    Change habits at home to save energy (14%)
For more information about the Energy Pulse 2008 study, click here.