Complex sentence: Since the 1970s, he has been known for his commitment to environmental restoration, such as the restoration of a limestone quarry wasteland in Mombasa, Kenya, into the nature park and wildlife sanctuary named Haller Park.
Split into simpler sentences: Since the 1970s, he has been known for his commitment to environmental restoration. He is best known for his restoration of a limestone quarry wasteland in Mombasa, Kenya, into the nature park and wildlife sanctuary named Haller Park.