Complex sentence: Scenic Hudson was founded as the Scenic Hudson Preservation Conference on November 8,1963, when Hudson Valley residents organized to save Storm King Mountain from being transformed into the world's largest pumped-storage hydroelectric plant.
Split into simpler sentences: Scenic Hudson was founded by the original group Scenic Hudson Preservation Conference on November 8,1963. The community came together in order to save Storm King Mountain from turning into the world's largest pumped-storage hydroelectric plant.