Nicolás LISO FABBRI: CONTRATO DE OBRA- ¿Qué es y cuántos existen?
Mira este interesante vídeo, donde podrás descubrir el significado y alcance de un contrato de obra, y sus diferentes formatos.
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Nicolas Liso Fabbri: RENEWABLE ENERGY TECHNOLOGIES: Types Renewable energy technologies enable us to create electricity, heat and fuel from renewable sources. Solar, wind, hydro, wave, heat-exchange, tidal, wave and bioenergy technologies are all powered by the sun, directly or indirectly. Tidal and wave energy technologies are also powered by the moon. Geothermal technologies are powered by deep heat from the Earth's core. Bioenergy technologies allow us to convert the solar energy stored in plants, food wastes, farm wastes, forest wastes, sewage, and algae into heat, electricity and fuel, using a variety of approaches. These technologies allow us to heat and cool our buildings, generate electricity, and to travel by land, sea, and potentially also by air without generating dangerous greenhouse gases and other forms of pollution. WIND Wind power transforms the kinetic energy of the wind into electricity through rotation of the turbine’s blades. This crea
Some analysts are positive about hydrogen, but also cautious. The dream of a hydrogen-based green economy seemed to have faded, but it has regained momentum, and this time it may be here to stay. Today this element is seen by many as an effective option to "clean" the smoke from our roads, the so-called "decarbonization", the great challenge for environmentalists. The use of hydrogen as a fuel is not new: the technology has been around for decades. It was used, for example, on NASA spacecraft. In fact, the first combustion engine in history ran on hydrogen. It has been proposed for all possible industries - it is the most abundant chemical element in the universe - but until recently it had not emerged as a 100% sustainable alternative to generate large amounts of energy. The key: that when hydrogen burns it only leaves behind water vapor, rather than the greenhouse gases that come from fossil fuels. Furthermore, it is lighter than any other element on the periodi