You should change the environment that is causing you harm.
"You should change"＝「あなたは変えるべき」
"the environment"＝「環境」
"that is causing you harm"＝「あなたに害を与えている（環境）」
例文："Instead of relying on alcohol or whatever else that momentarily relieves you of your stress, you should change your environment that is causing you harm."
アメリカ合衆国 
