Shane Wolf, (C), 18, moves his tassel signifying his official graduation from high school in Denver, Colorado, U.S., May 27, 2021. Wolf, who was accepted to the University of Denver, said success once meant wealth. "But now I'm really focused on the environment," he said. "Because of my culture, my mom and my grandpa." "I feel like we as young people have this sense of urgency and responsibility," Wolf said. "This generation just has such a responsibility to really save this planet." REUTERS/Kevin Mohatt SEARCH "CLASS OF 2021" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES