Childhood TV viewing can cause teenage problems .
) Two men chat in front of flat screens at an exhibition stand of the IFA 2007 consumer electronics fair in Berlin August 30, 2007. Manufacturers at Europe's biggest consumer electronics touted their green credentials in vain to customers more interested in bigger and brighter screens. REUTERS/Hannibal Hanschke CHICAGO (Reuters) - Watching television more than two hours a day early in life can lead to attention problems later in adolescence, according to a study released on Tuesday. The roughly 40 percent increase in attention problems among heavy TV viewers was observed in both boys and girls, and was independent of whether a diagnosis of attention deficit/hyperactivity disorder was made prior to adolescence. The link was established by a long-term study of the habits and behaviors of more than 1,000 children born in Dunedin, New Zealand, between April 1972 and March