An environment-controlled multi span structured greenhouse comprising a roof, four sides, a release blower equipped with a heating module in relatively cold weather geographical locations, and equipped with a cooling module in relatively hot weather geographical locations, a capture blower, a release blower, a release manifold, and a capture manifold for low cost of supplementary heating and cooling of the greenhouse air, obviating burning fossil fuels thereby reducing global warming, wherein the external surfaces of the roof and the external surface of at least one side of the greenhouse comprise a light diffusing film on predetermined areas and locations thereof together with a thermal shading film affixed to the surface areas not comprising the light diffusing film, and wherein the greenhouse further comprises a mechanized module for adjusting the height of artificial light source and a module for melting snow
