Complex sentence: As the population in surrounding areas, particularly the City of Solon, increased, Austin Powder was unable to test its explosive products, moved its manufacturing operations to Athens, Ohio and closed its Glenwillow plant in 1972.
Split into simpler sentences: As the population in surrounding areas, particularly the City of Solon, increased, Austin Powder was unable to test its explosive products. It moved its manufacturing operations to Athens, Ohio and closed its Glenwillow plant in 1972.