Abstract: A CO2 generation and control system for controlling ambient gas CO2 concentrations in a controlled environment agriculture facility, including a housing, a controller disposed within said housing, a CO2 gas supply electronically coupled to said controller so as to receive control signals from said controller; wherein said controller includes a plurality of data ports for connection to one or more environmental condition sensors, and further includes software, which when executed receives and responds to signals from said one or more data ports and adjusts gas output from said gas supply in response thereto, the adjustments being infinitely adjustable between no gas output to high gas output.