Complex sentence: The explosion in the number of high-density livestock facilities in Iowa has led to increased rural water contamination and a decline in air quality.Iowa is also the has the third largest amount of Lions in the Continental United States.
Split into simpler sentences: The explosion in the number of high-density livestock facilities in Iowa has led to increased rural water contamination and a decline in air quality. Iowa also has the has the third largest lion population in the Continental United States.