The first reason that make problems to our health such as when you play the internet a lot of time. This mean that you play the computer a lot. This make effect to our eyes that can make our eyes short-sighted and sensitive to light. In the same way the internet can make our overweight because when you play the computer you spend a time to sits front of the computer that make you can't to exercise. This mean that internet is cause make our to overweight.
The second reason that make to waste our time. Game online make that it make for our spend a lot of time to play for level up or ranks up in the game. In the same way, chat room it make for our spend a time to chat to friend or other people. That make our for have no time to doing somethings that make benefits to our lifes. However it is can't happen if it's without the internet.