Passive Greenhouses and Ecological Reconstruction

This paper is discussing the ecological reconstruction opportunity opened by the extended use of the energetic passive greenhouses, independent of any conventional infrastructure (water, gas, electricity). A specific passive greenhouse configuration is considered: the main heating device is a heat pump extracting energy from cold underground water. A dc wind generator is supplying the small amount of energy necessary for the recirculation of the water. Solar panels are also included. The extensive use of passive greenhouses could significantly change the future agriculture: the replacement of the huge cereal cultivated surfaces by forests, orchards and pastures. This way the Earth vegetal matter will substantially increase the absorption of the CO₂ from the atmosphere. A structural model of the passive greenhouse is proposed.