Greta Thunberg
Her father doesn't like that she misses school but says: "[We] respect that she wants to make a stand. She can either sit at home and be really unhappy, or protest, and be happy". To lower her family's carbon footprint, she insisted on becoming vegan and give up flying. She said she persuaded her parents to give up eating meat by making them feel guilty. "I kept telling them that they were stealing our future."  Her mother gave up her international career as an opera singer. Despite invitations to speak at international events, Greta also avoids flying.