The Massive Greenhouses of Almeria — Spain

Since the 1980s, the small coastal plain, some 30 kilometers southwest of the city of Almeria, has developed the largest concentration of greenhouses in the world, covering 26,000 hectares. Several tons of greenhouse vegetables and fruits such as tomatoes, peppers, cucumbers and zucchinis are produced here annually. More than half of the Europe’s demand for fresh fruits and vegetables are grown under the plastic shades, fuelling the province of Almeria's economy by $1.5 billion in annual revenue.

But 35 years ago, this region in the southeast of Spain was dry and arid, and desert-like, receiving an average of 200 mm of rainfall a year. In fact, Spaghetti western films were once shot here, because the land was so dry and barren. But with imported soil and fully hydroponic systems that drip-feed chemical fertilizers into grow-bags, over the last 35 years, the area has been intensively used for agriculture.

A mix of thousand of smallholders and large companies tend the crops inside the plastic greenhouses. Temperatures can reach more than 45 degrees Celsius inside. Many Spanish workers find it too hot to work and the conditions too brutal so the sweat-houses are staffed mainly by legal and illegal immigrants from Africa and Eastern Europe. One hundred thousand immigrants are thought to work in the greenhouses and many believe it is the lack of workers-rights that help the businesses to be profitable. Many ‘farms’ have no toilets and women are often forced into prostitution. Some workers are also sold contracts to work, which have to be repaid to their bosses. The Network for The Promotion of Sustainable Consumption in European Regions, estimate that workers are paid between 33 and 36 Euros per day.

Almeria's sea of white-roofed greenhouse is so vast that researchers from the University of Almeria have found that by reflecting sunlight back into the atmosphere, the greenhouses are actually cooling the province. While temperatures in the rest of Spain have climbed at rates above the world average, the local temperature has dropped an average of 0.3 degrees Celsius every 10 years since 1983.