teacher discussing about green energy and recycle at desk in classroom

academic adult african answering attentive bench bin black boy boys caucasian chalkboard child childhood classmate classroom concentration conservation desk development discussing diverse diversity ecology education elementary energy environment ethnically ethnicity explaining female focused girl girls glass green group hand indoors information innocence intelligence intelligent kid knowledge lifestyle magnifying male medium mixedrace multiethnic of people person raised recycle renewable resources school schoolboy schoolgirl schoolmaster schoolteacher sitting student studying sustainable talking teaching uniform windmill wisdom woman women young