A321
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Troubleshooting; Workload
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
[I] noticed [a] strange odor on takeoff roll. Flight Attendants called passing about 7000 ft. Determined odor not dissipating; so [flight] returned to ZZZ.Cause - poor aircraft design.Suggestion - fix problem with contaminated air entering cabin/cockpit.
Air Carrier First Officer reported being notified by flight attendants during departure climb of a persistent odor. Flight crew determined odor was not dissipating and elected to execute a safe air return.