Based on the situational theory of publics, this study explores the relationships among public recognition problems, information processing, and policy support. An Internet survey was conducted on 1,130 young Taiwanese adults in August 2009. The results showed that the majority of the interviewees could be categorized as constrained behavior publics (i.e., high problem recognition and high constraint recognition). The results of multiple regressions indicated that problem recognition can only predict passive information processing, not active information seeking. The variables of problem recognition and problem involvement can predict active information seeking. In addition, people who are categorized as high problem involvement and low constraint recognition are more supportive of global warming-related policies. The study concludes with suggestions for future studies and risk communication strategies regarding global warming issues.