people can be influenced by the environment

Some people always said the environment influenced them, they put all the trouble problem to environment but they never think about themselves. I am not against people can be influenced by the environment but most people who think like this, they have to know if they don't want change, nothing can influence them.
Nearly, i heard alot of people said, their friends who go to foreinor country and influence by the environment. I think it's ture, people can be influenced by the environment. If individuals live in a good environment that people go forwards and study hard, you will be influenced by them. And in same way, if you live in a bad environment that people cost a lot of money to play and never study, you will get in wrong way either. I never oppose this opionin, but i think the environment is choosed by youselves, you have to response for youselves.
I have a friends, she went to Victoria in last year for high school study. And because she is not a native speaker, so the teacher always take easy for her. Like in little quiz, she can do it with book or she get more chance for quiz. But she didn't cherish the special treatment, she doesn't study at all. Her homestay told to her, do not play with the Jepanese girl who is live in the home. But she didn't listen to the homestay mom, she paly with the Jepanese girl and she smoke with the Jepanese girl. Now, she is totally in wrong way, but that is what she choice. NOthing about environment.
There is another people who is go to Toronto, he live in bad environment area. But he can control himself. When his classmate ask him to smoke, he always get some reason for he can't go. But they are friends, they always play basketball together. That is what i am saying, he is not influenced by the environment, although the environment is so bad.
Anyway, i agree with people can be influenced by the environment but they can choose how to live in the environment. And not just follow people in the environment. Therefore, If people change, i think some reason is beacuse themselves.