Complex sentence: These particles are still emanating out of the facility at Yamsk 11, but dissipates over distances, causing the "mental pollution" of the people in Yamsk 11 and led them to kill each other and destroy the complex.
Split into simpler sentences: These particles are still emanating out of the facility at Yamsk 11, but dissipate over distance. They caused the "mental pollution" of the people in Yamsk 11 and led them to kill each other and destroy the complex.