A greenhouse and a method for growing plants and/or vegetables in a greenhouse

A greenhouse (102) comprising: a floor (102), a substantially transparent roof (104) and side walls; wherein a substantially 5 transparent inner roof (104a) is provided parallel to and at a distance from the roof (104), thereby providing an air gap between the roof (104) and the inner roof (104a); an inlet opening (104b) is provided in the inner roof (104a) near the top edge of the roof (104), such that, during use, moist air which rises from the plants and/or 10 vegetables to the top of the interior space of the greenhouse (102) is allowed to flow into the upper part of the air gap between the roof (104) and the inner roof (104a); an outlet opening is provided near the floor (102), such that said air is allowed to flow from the lower part of the air gap between the roof (104) and the inner roof (104a) 15 back into the interior space of the greenhouse (102); a water collecting device (108) is provided under the air gap between the roof (104) and the inner roof (104a), such that, during use, condensed water which is formed in the air gap flows into the water collecting device (108); and a water guiding device (109) is provided between the 20 water collecting device (108) and the floor (102), such that, during use, condensed water which is formed in the air gap and which is collected in the water collecting device (108) is fed to said plants and/or vegetables.