NOVELTY - Producing syngas (I), comprises: (a) introducing aquatic biomass, a fossil fuel, water and oxygen to a gasifier and forming syngas comprising hydrogen, carbon monoxide and carbon dioxide; and (b) feeding aquatic biomass with carbon dioxide derived from the syngas.    USE - The method is useful for producing syngas that is useful for producing ethanol (claimed), carboxylic acids, esters, aldehydes, olefins and polymers.    ADVANTAGE - In the method, runoff from the gasifier provides nutrients for the algae or aquatic biomass that is fed with carbon dioxide, (claimed) thus forming desirable syngas composition, while increasing biomass production. The method: increases hydrogen to carbon monoxide ratio to make syngas suitable for methanol production, while increasing carbon dioxide content that is utilized for biomass growth; produces biochemicals from renewable sources; allows integration of several chemical processes; is operated at high pressures, thus avoiding multiple costly compression stages; exhibits synergy with respect to overall emissions including green house gas emissions without sacrificing the energy content of the product gas; reduces overall production of the carbon dioxide; alleviates biomass feed stocks fluctuations; allows biomass feed stocks benefit from same economies as achieved with coal gasification; and produces cleaner syngas that has lower sulfur and ash content and neutral carbon foot print.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing ethanol (II) from aquatic biomass and the fossil fuel, comprising: steps (a) and (b) as above per se; (c) compressing the syngas to form compressed product gas; (d) directing a first portion of the compressed product gas to an alcohol synthesis reactor to produce methanol; (e) directing a second portion of the compressed product gas to a gas separator to produce a hydrogen stream and a carbon monoxide stream; (f) reacting the carbon monoxide stream with the methanol to produce acetic acid; and (g) reacting the hydrogen stream with acetic acid to produce ethanol.