Swedish teenager Greta Thunberg is in the running for the Nobel Peace Prize next month. But her outspoken shaming of world leaders over climate change presents a dilemma for the Nobel committee. At 16, she’d be the youngest-ever recipient of an award won by the likes of Nelson Mandela. And the first to win it for environmental activism since former U.S. vice president Al Gore in 2007. But the very confrontational approach that has made her the global face of climate activism raises hackles. Especially #flightshame — where she calls out those who travel by plane. A former deputy member told Reuters the Nobel committee might see the notion of shame as unconstructive. Thunberg struck a chord last year with her school strike outside the Swedish parliament, since emulated by young people around the world. This week she harangued world leaders at the U.N. climate summit, accusing them of stealing her dreams and childhood. Resulting in a Twitter spat with U.S. President Donald Trump. The Nobel committee will also consider Thunberg’s age and the pressures of even more intense public scrutiny. Five years ago, Malala Yousafzai won the award at 17, but the Pakistani education activist was less divisive than Thunberg. Insiders though still believe Thunberg has a strong chance of winning.