Behavior-based and person-based perspectives are integrated to summarize approaches for dealing with the human element of ecosystem health. Behavior is selected by its consequences, and therefore interventions are needed to decrease the natural reinforcing consequences (e.g., convenience, efficiency) of environment-destructive behaviors and to increase the reinforcing consequences of environment-protective behaviors. An ABC Model (for Activator-Behavior-Consequence) can be applied effectively to design intervention programs for benefiting the human behavior aspects of ecosystem health. However, intervention agents are needed to implement positive behaviorchange techniques, and this requires people to actively care enough to emit other-directed (or altruistic) behaviors for the health of the ecosystem. Person factors which influence one's propensity to actively care include: selfesteem, belongingness, and empowerment, influenced by perceptions of self-efficacy (I can do it), personal control (I am in control), and optimism (I expect the best). Strategies are reviewed for increasing these person states or expectancies. The health of our ecosystem depends upon people changing their behaviors and attitudes regarding the environment. Behavior-based psychology offers the technology for changing behaviors and attitudes in desirable directions; person-based psychology offers the states or expectancies needed in people to increase their willingness to actively care for the environment. By applying the theory and principles from these subdisciplines of applied psychology, the critical human element of our ecosystem can be accounted for and managed effectively.