An environmentally controlled greenhouse having a roof, the greenhouse comprising:
- a capture manifold for capturing a carbon dioxide rich greenhouse air during dark hours and an oxygen rich greenhouse air during sunlight hours;
- a compressor for compressing the captured carbon dioxide rich and oxygen rich greenhouse air;
- a first tank (T1) and a second tank (T2) for dehumidifying, or for maintaining relatively dry, the compressed carbon dioxide rich and oxygen rich greenhouse air;
- a release manifold for releasing into the greenhouse at cultivation level, the dehumidified or relatively dry carbon dioxide rich greenhouse air during the sunlight hours, and the dehumidified or relatively dry oxygen greenhouse air during the dark hours;
- a third tank (Ta) for storing and dehumidifying compressed atmospheric air for release into the greenhouse to maintain a balance between carbon dioxide and oxygen;
- an earth tube heat exchanger comprising a first compartment (Ec) for storing the dehumidified carbon dioxide rich greenhouse air, a second compartment (Eo) for storing the dehumidified oxygen rich greenhouse air, a third compartment (Ecd) for storing the relatively dry carbon dioxide rich greenhouse air, and a fourth compartment (Eod) for storing the relatively dry oxygen rich greenhouse air, wherein, in relatively cold weather geographical locations, the earth tube heat exchanger conditions relatively cooler greenhouse air to relatively warmer greenhouse air and, in relatively hot weather geographical locations, the earth tube heat exchanger conditions relatively warmer greenhouse air to relatively cooler greenhouse air,
- and wherein the earth tube heat exchanger maintains the greenhouse air temperature at a predetermined temperature set point which is equal to an average thermal constant temperature of the geographical location of the greenhouse;
- and
- a carbon dioxide sensor,
- wherein when the content of carbon dioxide in the greenhouse is higher than a predetermined carbon dioxide content set point due to carbon dioxide released by the plants during the dark hours or due to residual carbon dioxide available after carbon dioxide enrichment events during the sunlight hours, the greenhouse carbon dioxide sensor switches on the capture manifold, the compressor, the first tank (T1), the second tank (T2), the release manifold, the third tank (Ta), and the earth tube heat exchanger, and the capture manifold captures the carbon dioxide rich greenhouse air, the compressor compresses the captured carbon dioxide rich greenhouse air, the compressed carbon dioxide rich greenhouse air is dehumidified in the first and second tanks (T1) and (T2), the carbon dioxide rich dehumidified greenhouse air is stored into the first compartment (Ec) and the release manifold releases into the greenhouse, at a cultivation level, the oxygen rich dehumidified conditioned greenhouse air stored in the second compartment (Eo) for maintaining the greenhouse carbon dioxide content at the predetermined carbon dioxide content set point which is equal to the content of carbon dioxide in the atmosphere, and wherein the greenhouse reduces global warming by preventing the greenhouse carbon dioxide from being released into the atmosphere by capturing, compressing, dehumidifying, storing and utilizing the greenhouse carbon dioxide for enrichment during the sunlight hours for maximizing the yield of plants growing in the greenhouse and for maintaining the greenhouse carbon dioxide content at the predetermined carbon dioxide content set point that is equal to the atmospheric carbon dioxide content.