'certain impacts' is correct and usable in written English.
You can use it when you want to indicate that a particular event or action has had some specific and measurable consequences. For example: "The increase in taxes has had certain impacts on the economy."
BURKE: People tend to have in mind certain impacts when they think about climate change.
The assessment showed that although contributing to more participatory societies was not among the main aims of the particular exercises, they managed to achieve certain impacts facilitating increased public participation or directly improving democratic processes in policy-making.
The results show that the urban river reconstruction project has extremely significant impacts on the species richness of wild vascular plants in the river ecosystem, and certain impacts on the frequency and species composition.
"Although the talks will be over Iraq, these talks would have certain impacts on other regional developments and also on nuclear diplomacy," said Reza Talainik, head of parliament's national security and foreign affairs committee, ISNA reported.
A Montgomery County lawmaker is urging the county to help residents prepay their property taxes before the end of the year, a move that seeks to dodge certain impacts of a Republican-backed federal tax plan but could be tricky to enact.
Both the fault location and the fault ground resistance have certain impacts on the traditional DC line protection.
A ranking of 0 means no danger; a 10 means certain impact with worldwide devastation.
"It's a company doing wild and extroverted sculptural pieces which have a certain impact".
The dam, it said, had had "a certain impact" on navigation, irrigation and water-supply downstream.
In a first step, HHP boundary conditions with a certain impact on LWE viscosity were established.
Nevertheless, a reduced dependency between the impact energy and the residual strength is found above a certain impact energy threshold.
