We hope that these programs will have a positive 'impact on' the community. [=will help the community]
The stress of her job is having a negative 'impact on' her health. [=is harming her health]
We need to be concerned about the environmental 'impacts' of all this construction.
(..) I'm sorry. You should take some credit for who I've become. Okay. So let me tell you how I turned out... just so you're crystal clear on your impact. I am not well-adjusted. More often than not, I am barely keeping it together. I'm constantly texting, and there's no one at the other end. (..)2013 TvShow: Community Title: Cooperative Escapism in Familial Relations Season: 4 Episode 5