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Mike travels to Ohio to check on the Common Tern population and then he finds himself in Northern California plugging an abandoned mineshaft.
Mike heads to Pennsylvania and tries his hand at making bologna and then goes to Alaska to repair a very special toilet.
Mike takes a trip to the La Brea Tar Pits in Los Angeles to find out about the important work being done in Pit 91. Then Mike travels north where he learns about rendering and discovers how much of a farm animal can be recycled.