NOVELTY - Producing potable water which system involves separating coal bed methane produced water into two streams having methane and water; introducing methane from the methane stream into a fuel cell to produce heat and energy; introducing water from the water stream into a desalination plant; using the heat and energy from the fuel cell to separate the salts from the water stream in the desalination plant; delivering non-brine bearing water to a distribution point.    USE - For producing water (claimed).    ADVANTAGE - The method provides potable water production. The method irrigates water from the first subsystem, a cost effective source of raw material for a gasification plant to produces syngas.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for following:    (1) preparing syngas from coal bed methane produced water which involving separating coal bed methane produced water into two streams having a methane stream and water stream; introducing methane from the methane stream into a fuel cell to produce heat and energy; introducing water from the water stream into a desalination plant; using the heat and energy produced from the fuel cell to separate the salts from the water stream in the desalination plant, to produce non-brine bearing water; using the non-brine bearing water to irrigate fast growing trees and crops; harvesting the fast growing trees and crops and processing them for use in a gasification plant; gasifying the fast growing trees and crops to prepare syngas; and    (2) a system for irrigating fast growing trees and crops for use of the trees and crops in a gasification plant comprising a coal bed methane produced water separator having two output streams to separate the methane from the water, the methane output stream being the input stream for a fuel cell, and the water output stream being the input stream for a desalination plant; a fuel cell connected to methane input stream; a desalination plant connected to the water input stream, and plant also being operatively connected to fuel cell for the powering of plant; plant having a water output means; water distribution arranger means connected to the water output of desalination plant, for the distribution of water to an irrigation units for fast growing trees and crops; harvested tree and crop processing units for the preparation of raw material for a gasification plant, and a vegetable matter gasification plant adapted to utilize fast growing tree and crop matter as its input for the preparation of syngas.