It is said that it causes tiffs between parents and leads to obesity in children and affects teens.
if yes then how to overcome it.If no then how to set limit?

your statement is absolutely true! what can we do about it? honestly i have no idea. because tv has also ruined my life as well.

instead of going out and meeting new friends and living? i chose the safe thing to do. live my life through television. my parents really didn't care if i wasted most of my life in front of the TV, 14 hours a day. as long as i wasn't sick or doing something that they would have to watch me,or worry about, they didn't care. for almost 30 year! teens, twenties and thirties i spent my life in front of the TV.

parents make the mistake of letting the kids have tv in their rooms. and also a computer and a video game console. for many years we [my family] had one tv in the living room.

most parents believe that as long as the kid is watching tv or playing games, and not out someplace they have to worry about the kid getting killed, they [parents] would rather have the kid watch tv for 10 hours or play games for 10 hours.

its a mistake most parents make. but you cant tell parents it's wrong! because they will say ''who are you to tell me how to raise my kids''

there isnt a simple answer to this question you have posted. if parents are that concerned they must take away all 3! computer. xbox. and tv.