NOVELTY - Growing and harvesting (M1) algae biomass involves: applying algae cells to substrate for growth in or on substrate, where substrate and algae is in gaseous environment that includes carbon dioxide and water to support growth of algae including to hydrate the algae; applying liquid to substrate; applying nutrient to substrate; reducing applying of liquid to substrate for period of time before applying the nutrient to the substrate; reducing applying of liquid to substrate for period of time after applying the nutrient to substrate; applying light to algae and the substrate.    USE - For growing and harvesting algae biomass (claimed); for the growth of algae immobilized on a support in a gaseous environment supplying access to sources of carbon dioxide and light, and for subsequent harvesting and biomass processing; as feedstock in biorefinery as opposed to fossil resources used in a petroleum biorefinery which is used in producing wide range of products such as fuels, materials, chemicals or biological resources.    ADVANTAGE - The method reduces or minimizes the use of water to increase the light and carbon dioxide available to the algae; is used in conjunction with a carbon dioxide capture device, such as taking carbon dioxide from a combustion, such as a gas furnace used in an adjacent building. Thus the reduced and focused use of water allows for efficient use of nutrients, which reduces cost and can make use of nutrients provided by polluted materials. The produced biomass is used in integrated biorefinery which is capable of producing multiple product streams and thus multiple income streams from a single biomass feedstock and, thus is more economically viable than single product-based production schemes. The method is cost effective.    DETAILED DESCRIPTION - Growing and harvesting (M1) algae biomass involves: applying algae cells to a substrate for growth in or on the substrate, where the substrate and algae is in a gaseous environment that includes carbon dioxide and water to support growth of the algae including to hydrate the algae; applying liquid to the substrate to further hydrate the algae; applying nutrient to the substrate to feed the algae; reducing the applying of the liquid to the substrate for a period of time before applying the nutrient to the substrate; reducing the applying of the liquid to the substrate for a period of time after applying the nutrient to the substrate; applying light to the algae and the substrate to support growth of the algae.