Complex sentence: If the relative value of sending the unprocessed natural gas to a consumer exceeds the value of extracting ethane, ethane extraction might not be run, which could cause operational issues managing the changing quality of the gas in downstream systems.
Split into simpler sentences: If the relative value of sending the unprocessed natural gas to a consumer exceeds the value of extracting ethane, then the plant may not be run. This can cause operational issues managing the changing quality of the gas in downstream systems.