Decreasing greenhouse gas emissions (climate change mitigation) is one of the most important types of pro-environmental behavior. Greenhouse gases have been repeatedly cited as a leading cause of climate change (CC). However, before engaging in CC mitigation behaviors, individuals must accept the reality of CC. Few studies addressing the influence of individual time perspective on climate change mitigation have been found. No study investigating the relationship between time perspectives and acceptance of the reality of CC exists. This study was aimed at filling that research gap. The study examines the impact of consideration of immediate and distant consequences of behavior on individual acceptance of the reality of CC and commitment to engage in CC mitigation behaviors. Two-hundred-and-forty-five undergraduate students responded to an instrument investigating those variables. A structural-equation model revealed that consideration of distant consequences affects acceptance of CC, but considering immediate consequences do not influence that acceptance. Accepting that CC is real affects the commitment to act pro-environmentally, which in turn influences CC mitigation commitment. Consideration of distant consequences also positively affects willingness to engage in CC mitigation; yet, consideration of immediate consequences produced no effect on that commitment.