Complex sentence: In the 1980s Greene devoted his energies to wildlife and environmental issues and he was the host and narrator of the nature series, "Lorne Greene's New Wilderness," a show which promoted environmental awareness.
Split into simpler sentences: In the 1980s Greene devoted his energies to wildlife and environmental issues. He was the host and narrator of the nature series, "Lorne Greene's New Wilderness," a show which promoted environmental awareness.