Greta Thunberg’s North Dakota photo is at national library

Climate activist Greta Thunberg visits the Standing Rock
Climate activist Greta Thunberg visits the Standing Rock Sioux Reservation in Fort Yates, N.D., on Oct. 8. Thunberg accepted the photographer's request to pose for the photo using an old technique that involves wetting glass plates with various chemicals before making an exposure.
Shane Balkowitsch | AP Photo