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A NASA Survey Identified a White Spot in Southern Spain as the Only Man-Made Structure Clearly Visible to the Naked Eye from the International Space Station
The idea of seeing works like the Pyramids of Egypt or the Great Wall of China from space has been a popular reference for decades, but the reality is different. From the International Space Station, what stands out clearly to the naked eye is an agricultural phenomenon concentrated in southern Spain.
The name draws attention, but the scenario is quite practical: it is the plastic sea of Almería, an immense area of greenhouses covering more than 40,000 hectares in southeastern Spain. The collection appears as a bright white band due to the way it interacts with sunlight.
The impact goes beyond mere spatial curiosity. The structure transformed an arid environment into a productive hub, boosting exports and pressing debates about water and waste. To understand why this area is visible from space, one must look at the material that covers the crops and the scale of this agricultural model.
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Why the Plastic Sea of Almería Appears So Clear from Orbit
The plastic sea is not an ancient monument nor a classic architectural work. The visibility comes from the combination of gigantic scale and a simple detail: the roofs of the greenhouses are covered with white polyethylene, a material that strongly reflects light.
This reflectivity creates a bright area that contrasts with the semi-desert surroundings. In satellite images and records made by astronauts, the region stands out as a bright spot near the coast, catching attention even when other constructions are camouflaged in the landscape.
Aside from the color and brightness, the decisive factor is the continuity of the ensemble. Instead of a single small point, there is a broad and continuous expanse of reflective surfaces, which increases the chances of direct identification from the International Space Station.
Where the Dalías Field Is and How the Greenhouses Occupy the Region
The area spreads across the Dalías Field in the province of Almería, in southeastern Spain. The terrain is arid, with a harsh climate, and the plastic covering altered the appearance of the soil to the point of marking the region in records made from space.
The size of the agricultural complex is also highlighted by numbers associated with the greenhouses. There are over 28,500 hectares of greenhouses, consolidating the territory as one of the major agricultural production centers in Europe.
The practical result is a landscape completely distinct from the surroundings, with thousands of white covers forming a continuous carpet. This visual uniformity helps explain why this area manages to stand out in orbital observation.
What the Confirmation in 2007 and the Images from 2022 Showed in Practice
The identification of the plastic sea as a structure visible to the naked eye from the International Space Station was confirmed in 2007 by Spanish astronaut Pedro Duque. The observation reinforced that the highlight came from the contrast between the light roofs and the surrounding landscape.
Later, in 2022, images showed light reflecting in the region and forming a white spot near the coast of the Alborán Sea. The area was also visible by satellites like Landsat 9, which helps understand how reflectivity behaves in different types of captures.
This set of records makes the phenomenon easy to recognize in maps and high-altitude images. The central idea is simple: the more light that bounces back into space, the more evident the mark on the ground becomes in orbital observation.
Why the Great Wall and the Pyramids Don’t Make the List of What Is Visible to the Naked Eye
The Great Wall of China is often mentioned as visible from space, but this fame does not hold up when the criterion is to see with the naked eye. The structure follows mountains and relief, and thus tends to blend in with the surrounding geography, losing contrast over long distances.
Other constructions can be observed from space, but they fall into a different category. Pyramids of Egypt, Bingham Canyon mine in the United States, Three Gorges Dam in China, and Palm Jumeirah in Dubai can appear in photos taken by astronauts, but only with the help of powerful cameras and lenses.
The decisive point is the equipment. There is mention of telephoto lenses, and even the possibility of an 800-millimeter lens to record pyramids more clearly. To the naked eye, they do not stand out in the same way as the plastic sea.
How Advanced Agriculture Worked in an Extremely Arid Climate
Besides attracting attention from space, the plastic sea hosts a production model designed for harsh conditions. In a region with little water and a very dry climate, techniques like drip irrigation, which improves water use, and hydroponics, which allows cultivation without soil, were employed.
These choices helped enhance productivity and cultivation stability in an environment that would naturally have severe limitations. Temperature control and internal management of the greenhouses also contributed to creating more predictable conditions throughout the year.
In practice, this sustained a leap in production capacity and created an agricultural hub that remains active even when external climate conditions are hostile. The result is a constant output in a region that, without this system, would have much less space in the supply chain.
Volume of Production, Exports, and the Role of 2.5 to 3.5 Million Tons Per Year
The scale of the complex also appears in the amount produced. The region generates between 2.5 and 3.5 million tons of fruits and vegetables per year, occupying an important space in providing off-season food for Europe.
Among the cultivated and exported products are tomatoes, peppers, cucumbers, and melons. Tomatoes and peppers stand out as significant items in external sales, highlighting the economic weight of the greenhouse system for the province of Almería.
This combination of volume and regularity helps explain why the plastic sea has become a reference. It is not just about being visible from space, but also sustaining a continuous flow of large-scale production and distribution.
The Albedo Climate Effect and the Environmental Challenge of Plastic and Water
The reflectivity that makes the area visible also influences the local climate. An increase in albedo of 10% was observed between 1983 and 2006, indicating that more sunlight is reflected back into space, creating a localized cooling effect.
This behavior contrasts with warming trends in nearby areas and shows how changes in land use can alter regional temperatures. At the same time, the solution brings clear challenges related to the sustainability of the model itself.
The use of plastic on the roofs raises concerns when the material degrades, requiring research into more ecological options and recycling strategies. The intense water consumption also remains a topic of debate, especially in a scenario of increasing scarcity.
The history of this system began to take shape in the 1950s and 1960s, when farmers started using plastics to protect crops from wind, salinity, and intense sunlight. Over time, advances in irrigation and climate control solidified the area as a reference in agricultural efficiency, but with continuous pressure to reduce impacts.
Pra ver como o homem se limita em arrogantes estrutural milenar ,entre o cetu e a terra ha muitos segredos que o homem na diz ,não poder revelar , exploração intectual artificial se limita o homem sete o cansaço mas nao admiti,a morte é certa ,mas nao aceitável,pois as obras e maravilhas de ser que vivi e respira e se alimenta de sua natureza espontânea,nao acabará poi o caus nesse vão e apenas o nada que é incompreensivo .
Un comentario, con Filosofía, incluida, difícil, de Descifrar.
Tem que criar ar condicionado nas roupas refrigerar o corpo humano o mundo está aquecendo muito. Petróleo está poluindo o mundo. Muita poluição no tempos de hoje.
La zona resaltada es Tanger-Med, Marruecos, NO Almería.
Buenos dias querido lector! La zona resaltada en la imagen de portada del articulo es justamente el mar de plástico de Almeria, puede confirmarlo en varias fuentes. Gracias por su comentario y por ser parte de Click petróleo e gás, Saludos !
La zona resaltada es Almería SÍ, es que la imagen está al revés. Marruecos está en la parte superior e España está en la parte inferior de la imagen.