Nowadays many young people have many bad habits. They don't understand that their health suffers because of them.  Many teenagers  drink alcohol and use drugs. Some of them become net-addicted. There are many other bad things, but they all make you too weak.Some of them can lead to terrible  diseases and soon you can die. So if you want to live a long and happy life you must fight against your  bad habits, go in for sports, keep fit and eat more vitamins. Everything should have a limit. Take care of yourself and you will be a happy man!