Complex sentence: The reduction in diesel emissions is expected to save 9,400 lives within the 11 year time frame and reduce health care costs, with an estimated savings between $49 billion and $69 billion.
Split into simpler sentences: The reduction in diesel emissions is estimated to save 9,400 lives within the 11 year time frame and greatly reduce health care costs. Benefits are estimated to be between $49 billion and $69 billion.