COPENHAGEN, Denmark (AP) — Teen climate activist Greta Thunberg, who has inspired millions across the world to stage protests urging leaders to better tackle global warming, has declined an environmental prize, saying "the climate movement does not need any more prizes."

Two fellow climate activists spoke on Thunberg's behalf at an award ceremony Tuesday in Stockholm for the regional inter-parliamentary Nordic Council's prizes, reading a statement thanking the group for the honor. Thunberg, 16, is currently in California.

But Sofia and Isabella Axelsson quoted Thunberg as saying that "what we...