E-mails "hurt IQ more than pot"

A satisfying if obvious "World News" factoid from cnn.com:

E-mails "hurt IQ more than pot"

LONDON, England -- Workers distracted by phone calls, e-mails and text messages suffer a greater loss of IQ than a person smoking marijuana, a British study shows.

The constant interruptions reduce productivity and leave people feeling tired and lethargic, according to a survey carried out by TNS Research and commissioned by Hewlett Packard.