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Commodities at a Glance - Special issue on Shale Gas
… accordance with the precautionary principle to avoid the waste and/or deterioration of this precious 16 Water … known as flowback. It may be salty and loaded with hazardous elements originating from the source rock, such as … of large quantities of CH4 and CO2 as well as of other hazardous air pollutants, and enabling companies to recover …