"immense effect on" is correct and usable in written English.
You can use this phrase to describe a large, powerful influence that one thing has on another thing. For example, "The new policy had an immense effect on company morale."
In the smaller towns, the Syrian war had an immense effect on the local community.
They've had an immense effect on what has subsequently been seen on the catwalk".
In spite of this immense effect on elongation growth, gravi-curvature was similar to water controls.
Stringing has a noticeable if not immense effect on tone, and the young British cellist Steven Isserlis has opted for gut.
The results indicate that the diminutive difference in the heterocyclic structure comprising dyes have an immense effect on the performance of the DSCs.
He predicted the web 2.0 websites would have an "immense" effect on the forthcoming American election and decried the common misconception that old media had a significant effect on the political process.
Our world is facing the pandemic of influenza H1N1 viral infection with probable immense effects on daily lives and on the world economy due to the easiness of transmission and to the high virulence of the virus [1], [2].
Moreover, these centres radiated economic and cultural influence around them and so had an immense effect, particularly on the way of life of the more backward areas.
"Though one cannot say I am a rock-and-roll artist, one cannot overlook the folk music of the sixties, and the immense effect it had on popular music, including rock and roll," she said.
Nor did he anticipate the immense effect that the Internet would have on traditional media's ability to retain and attract readers.
Their decision to refuse to recognize the Ahmadinejad regime would have an immense effect.
