People in the Global North need to adopt high-impact behaviors (such as refraining from using a car or avoiding air travel). Given that numerous late adolescents may still reside with their parent/-s, assessing the personal adoption of high-impact climate behaviors could be challenging, as these decisions are often influenced by their parent/-s. Therefore, it might be more relevant to explore factors that can predict how morally responsible late adolescents feel, as moral obligation can be closely related to behavior. Climate-change worry, nature connectedness, parents´ social norms, and being female, have shown positive associations to climate-friendly engagement in previous research, whereas de-emphasizing coping has revealed a negative relationship. A questionnaire study was conducted with 596 Swedish senior high school students (age 16-20) in 2023, and data analyzed through hierarchical regression. Preliminary results reveal that after controlling for gender in step 1, the explained variance in moral responsibility increased from 12 % to 56 % when climate-change worry, nature connectedness, parents´ norms and de-emphasizing coping were entered into the model in step 2. The largest unique effect on moral responsibility was attributed to climate-change worry. The results suggest that more than half of the variability in late adolescents´ moral responsibility can be explained by the proposed predictors. Limitations and implications are discussed.