Homeland security studies is an evolving multidisciplinary field within U.S. higher education. Meta-focusing events, such as the September 11, 2001, attacks, led to the country’s focus on terrorism relative to disasters caused by natural hazards and technological accidents. This study sought and identified the extent to which homeland security programs included environmental studies in their curricula and the need for such programs. A mere four percent of homeland security programs explicitly include environmental security. The implications for homeland security as a field of practice and academic discipline are profound. The study found that environmental security is a vital component of homeland security and should be integrated into the curricula.