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.
(..) State rodent operatives report a per cent reduction in the number of vermin in the central proletarian zones. I just want to finish by saying a few words about the impact of this imminent neurological breakthrough. When the orgasm has been finally eradicated, the last remaining obstacle (..)1984 1984