In recent years, mindfulness has been considered as a potential source of proenvironmental attitudes and behavior. Present research is aimed at consolidating and expanding previous knowledge by proposing that mindfulness is related to both proenvironmental behavior and belief in global climate change through social dominance orientation (SDO). A first study was conducted on undergraduate students (n = 279) and found, as expected, that trait mindfulness was related to proenvironmental behavior through SDO. A second study using a known groups approach compared practitioners (n = 44) and nonpractitioners (n = 53) of Buddhist meditation, which is known to develop a mindful stance. Moreover, in Study 2, a measure of belief in global climate change was adopted as a further outcome. Again, trait mindfulness was related to both proenvironmental outcomes through SDO. Theoretical and practical implications are discussed.