NOVELTY - Process for converting biomass to a liquid biomass extract comprising fermentable sugars, comprises: providing biomass; placing the biomass into an atmospherically controlled chamber for a period of time and under suitable conditions to effect saccharification of the biomass and/or alcohol fermentation of the biomass, to provide a liquefied biomass; and serially extracting the liquefied biomass, to provide a liquid biomass extract and a residual solids fraction.    USE - The process is useful in: converting biomass to a liquid biomass extract and biomass to biofuel (ethanol) (all claimed); and converting low bulk density biomass to a high density biomass-derived product (high sugar content plant syrup or a high water content ethanol solution).    ADVANTAGE - The liquid nature of the biomass extract allows for cost-effective and convenient storage and transport of useful plant-derived molecules (for e.g. the liquid biomass can be stored at the site of production or elsewhere in any suitable liquid storage container). The biofuel production process describes saccharification and/or fermentation of bulk fresh biomass, in the absence of added water or of significant amounts of added water, followed by pipeline transport of a sugar and/or alcohol solution over significant distances. The process facilitates the capture and reuse of large amounts of water.    DETAILED DESCRIPTION - Process for converting biomass to a liquid biomass extract comprising fermentable sugars, comprises: providing biomass, where providing the biomass comprises harvesting a plant material and the harvesting is timed to provide a plant material comprising a moisture content of 70-95%; placing the biomass into an atmospherically controlled chamber for a period of time and under suitable conditions to effect saccharification of the biomass and/or alcohol fermentation of the biomass, to provide a liquefied biomass, where the liquefied biomass comprises residual solids, biomass-derived water, and water-soluble products comprising fermentable sugars or fermentable sugars and an alcohol; and serially extracting the liquefied biomass, which comprises: removing a first portion of the liquefied biomass from the chamber prior to significant degradation of the fermentable sugars to acid fermentation products; collecting at least a portion of the biomass-derived water and water soluble products from the first portion of the liquefied biomass; and repeating the removing and collecting for one or more additional portions of the liquefied biomass, to provide a liquid biomass extract and a residual solids fraction. INDEPENDENT CLAIMS are included for:    (1) a process for converting biomass to biofuel, comprising: providing biomass, where providing the biomass comprises harvesting a plant material at a first location and the harvesting of the plant material is timed to provide a plant material comprising a moisture content of between 70-95%; placing the biomass into an atmospherically controlled chamber at or in close proximity to the first location for a period of time and under suitable conditions to effect saccharification of the biomass and/or alcohol fermentation of the biomass, to provide a liquefied biomass, where the liquefied biomass comprises residual solids, biomass-derived water, and water-soluble products comprising one or more of fermentable sugars and an alcohol; extracting at least a portion of the biomass-derived water and the water-soluble products from the liquefied biomass, to provide a liquid biomass extract and a residual solids fraction; transporting the liquid biomass extract to a second location; and treating the liquid biomass extract, to provide the biofuel;    (2) a system for converting biomass to a biofuel, comprises: a treatment facility for processing liquid biomass extract; and a network comprising one or more pipelines for providing liquid biomass extract to the treatment facility from one or more remotely located liquid biomass extract production sites, where each of the remotely located liquid biomass extract production sites comprises a biomass source, an atmospherically controlled chamber, an extractor, and a pipeline inlet providing access to the one or more pipelines; and    (3) a process for converting biomass to biofuel comprises: providing biomass, where providing the biomass comprises harvesting a plant material at a first location and the harvesting is timed to provide plant material comprising a moisture content of between 70-95%; placing the biomass into an atmospherically controlled chamber at or in close proximity to the first location for a period of time and under suitable conditions to effect saccharification of the biomass and or alcohol fermentation of the biomass, to provide a liquefied biomass, where the liquefied biomass comprises residual solids, biomass-derived water, and water-soluble products, where the residual solids comprises non-water soluble polysaccharides and the water soluble products comprises one or more of fermentable sugars and an alcohol; preparing a slurry comprising residual solids and biomass-derived water; transporting the slurry to a second location; and treating the slurry at the second location, to provide the biofuel.    DESCRIPTION OF DRAWING(S) - The figure shows a block diagram of a process for converting biomass to ethanol.