Complex sentence: This correlation was found to be statistically significant, and shows that pollution levels may be related to, and contribute to, brain lesion formation and IQ scores, which, in turn, manifests as impaired intellectual capacity and/or performance.
Split into simpler sentences: This correlation was found to be statistically significant, and shows that pollution levels may be related to brain lesion formation and IQ scores. The implication of these findings is that high pollution levels contribute to brain lesion formation, which in turn, manifests itself as impaired intellectual capacity and/or performance.