What was found
DURING CLIMBOUT, SMELLED SMOKE AND VISUALLY COULD SEE A HAZE IN THE COCKPIT. THE F/A ALSO DETECTED SMOKE AND SAW A HAZE IN THE FORWARD CABIN. RAN THE QRH IAW PAGE SMO-5, SOURCE OF SMOKE WAS UNIDENTIFIED. DECLARED EMERGENCY, RETURNED TO FIELD, LANDED WITHOUT INCIDENT. R & R NR 1 ACM.