According to the latest Kelley Blue Book Marketing Research studies conducted on the company's top-rated Web site, the vast majority (nearly 90 percent) of car shoppers say they are concerned about the future of our environment. Among the survey respondents, 80 percent believe that individuals should make lifestyle changes in order to reduce CO2 emissions. Furthermore, 75 percent of shoppers say they have made changes to further the betterment of the environment, with the top lifestyle changes mentioned being recycling (54 percent), cutting back on driving (46 percent) and purchasing a fuel-efficient car (31 percent).