Complex sentence: The Prince mine was closed in November 2001, ending underground mining in Nova Scotia, however the Point Aconi GS continues to operate as it is the most modern thermal generating station in Nova Scotia and provides lower emissions than older plants of a similar size.
Split into simpler sentences: The Prince mine was closed in November 2001, ending underground mining in Nova Scotia. However, the Point Aconi GS continues to operate as it is the most modern thermal generating station in Nova Scotia and provides lower emissions than older plants of a similar size.