original: as demand for coal slipped following world war ii , mines began to close across the region , causing mass unemployment .
simplifications: many people lost their jobs when mines closed due to falling demand for coal after world war ii . as demand for coal slipped after world war ii , mines began to close across the region , leading to mass unemployment . as the amount of coal being used fell following world war ii , mines began to close across the region , causing a lot of people to lose their jobs . as demand for coal grew less after world war ii , mines began to close across the area , causing a lot of unemployment . after world war ii , the demand for coal decreased causing mines to close and people losing jobs . as demand for coal slipped following world war ii , the mines began to close across the region , causing mass unemployment . as the need for coal got smaller following world war ii , mines began to close across the area , causing many people to lose their jobs . the closing of coal mines due to decrease in demand after wwii led to mass unemployment .