Methods and apparatus for capturing carbon dioxide from ambient air and delivering said carbon dioxide to an enclosed environment are described. In general, the methods and apparatus comprise contacting a packed bed or fluidized bed device with a stream of ambient air, wherein the packed bed or fluidized bed device comprises a humidity-sensitive sorbent material that adsorbs carbon dioxide from the ambient air; contacting the packed bed or fluidized bed device with a stream of humid air to release the adsorbed carbon dioxide; delivering the released carbon dioxide to an enclosed environment; and optionally, repeating the steps of contacting the packed bed or fluidized bed device with ambient air and humid air in an alternating fashion.

Methods and apparatus for capturing carbon dioxide from ambient air and delivering said carbon dioxide to an enclosed environment are described. In general, the methods and apparatus comprise contacting a packed bed or fluidized bed device with a stream of ambient air, wherein the packed bed or fluidized bed device comprises a humidity-sensitive sorbent material that adsorbs carbon dioxide from the ambient air; contacting the packed bed or fluidized bed device with a stream of humid air to release the adsorbed carbon dioxide; delivering the released carbon dioxide to an enclosed environment; and optionally, repeating the steps of contacting the packed bed or fluidized bed device with ambient air and humid air in an alternating fashion.

An aeroponics apparatus (1, 201) comprising a grow bed (3, 203) with a reservoir (11, 211) for containing a liquid or a solution. An ultrasonic nebulizer module (5, 205) is attached to the grow bed (3, 203). The ultrasonic nebulizer module (5, 205) comprises an ultrasonic horn (23, 223) having an input end (25, 225) connected to an ultrasonic transducer (27, 227) and an output tip (35, 235). The ultrasonic horn (23, 223) is in contact with a wall (33, 233) of the reservoir (11, 211).

An aeroponics apparatus (1, 201) comprising a grow bed (3, 203) with a reservoir (11, 211) for containing a liquid or a solution. An ultrasonic nebulizer module (5, 205) is attached to the grow bed (3, 203). The ultrasonic nebulizer module (5, 205) comprises an ultrasonic horn (23, 223) having an input end (25, 225) connected to an ultrasonic transducer (27, 227) and an output tip (35, 235). The ultrasonic horn (23, 223) is in contact with a wall (33, 233) of the reservoir (11, 211).

A method is provided for producing a biochar solution. The method comprises the steps of collecting biochar particles, dispersing the biochar particles in a liquid solution and adding a stabilizing agent to keep the biochar in flowable suspension. The stabilizing agent may be added to the liquid solution or to the biochar prior to placing the biochar in solution.

A plant cultivation apparatus including a conveyor that contains a conveying device for a cultivation bed and a blowing means that sends a flow of air to plants on the cultivation bed on the conveying device. The plant cultivation apparatus is provided with a space for causing the flow of air to pass between the cultivation bed adjacent in a conveying direction and pass through a bottom surface of the conveying device.

Method of sequestration of carbon dioxide characterized in that it comprises: a step of production of at least one macrophyte plant species floating on an expanse of fresh water in order to form a raft of plant biomass; a step of transportation of said raft of plant biomass from said expanse of fresh water to a sea; a step of dispersal and decomposition of said raft of plant biomass on an expanse of said sea; at least one of said step of production, said step of transportation and said step of dispersal and decomposition being carried out with human assistance.

Method of sequestration of carbon dioxide characterized in that it comprises: a step of production of at least one macrophyte plant species floating on an expanse of fresh water in order to form a raft of plant biomass; a step of transportation of said raft of plant biomass from said expanse of fresh water to a sea; a step of dispersal and decomposition of said raft of plant biomass on an expanse of said sea; at least one of said step of production, said step of transportation and said step of dispersal and decomposition being carried out with human assistance.

The present invention provides a plant cultivation method, which enables plant cultivation under high salinity environment for a long time. A method for hydroponic plant cultivation under high salinity environment, comprising a cultivation step of hydroponically growing a plant with a cultivation solution having a sodium chloride concentration of 1% by mass or more, during which a salt resistance imparting treatment is performed at least once by bringing a salt tolerance imparting agent into contact with at least a part of a root of the plant, thereby maintaining salt tolerance of the plant.

The present invention provides a plant cultivation method, which enables plant cultivation under high salinity environment for a long time. A method for hydroponic plant cultivation under high salinity environment, comprising a cultivation step of hydroponically growing a plant with a cultivation solution having a sodium chloride concentration of 1% by mass or more, during which a salt resistance imparting treatment is performed at least once by bringing a salt tolerance imparting agent into contact with at least a part of a root of the plant, thereby maintaining salt tolerance of the plant.