PV energy represents 27.9% of employment for all renewables and is one of the types that contribute most to R&D (1.9% of GDP) [70]. In this regard, these figures position the energy sector near the EU28 average [15]. Although Spain's energy sector represents a higher percentage of its...
Other studies mention the use of alternative energy sources, relying on geothermal systems, for example [8–10]. The use of warm water pipes placed inside the crops canopy has also been proposed to perform heating and dehumidification near tomato crops rather than in the entire greenhouse zone ...