Complex sentence: During the 1950s and early 60's Wittenoom was Australia's only supplier of blue asbestos, the town was shut down in 1966 due to unprofitability and growing health concerns from asbestos mining in the area.
Split into simpler sentences: During the 1950s and early 1960s Wittenoom was Australia's only supplier of blue asbestos. The town was shut down in 1966 due to unprofitability and growing health concerns from asbestos mining in the area.