Green Day's album 'American Idiot' is considered a "punk rock opera."

The answer is true because Green Day's album "American Idiot" is considered a punk rock opera. The album tells a cohesive and narrative-driven story, revolving around themes of political disillusionment and personal struggle. It features elements such as recurring musical motifs, character development, and theatricality. With its distinct punk rock sound, thought-provoking lyrics, and storytelling approach, "American Idiot" embodies the concept of a punk rock opera.