'impact positively' is correct and usable in written English, and is commonly used to describe how something (or someone) is having a positive effect or outcome.
For example: The organisation's new initiatives have impacted positively on the local community by increasing access to healthcare services.
That can be a source of some frustration at times, but being in a position to impact positively on Ireland's scientific development is an attraction to many people.
Improving efforts to better the understanding of HIV positive women on HIV/AIDS and ART will therefore impact positively on their adherence to ART.
If you start a sport late you may not get to the Olympics, but it will still impact positively on your health.
I haven't visited the original in Hackney, but I can well imagine how the externals of this impact positively upon the experience.
Caron Bradshaw, chief executive officer of the Charity Finance Directors Groupp, said: "A number of announcements today will impact positively on charities.
"There are many things that councils do that impact positively on mental health but might not come with a mental health 'badge'badge
"They may be paying for their own education but they also need to put something back in to impact positively as an agent for change".
We also expect an improvement in GNM's performance due to the changes made during 2009/10, which will impact positively on GMG's results.
"Whatever the results are, they will impact positively the life of citizens, and this is the main task of local councils".
The Trust supports projects that have the involvement of the local community and which encourage sustainable improvement in prioritising education, but which also impact positively on health and employment opportunities.
News that Harbinger "is being seriously considered for" York's Juddmonte International Stakes two weeks today is evidence, if needed, that the commercial interests of the bloodstock industry can impact positively on the competitiveness of the sport.
