From the BBC, December 14:
On the edge of the sleepy town of Figueruelas, a single, vast wind turbine spins around, casting its shadow over the buildings nearby.
It's a reminder of the importance of renewable electricity in this windswept area of Aragón, in north-eastern Spain, whose plains are host to many of the country's wind and solar energy farms.
Figueruela's status as a symbol of Spain's green transition has been further boosted recently, as work starts nearby on the construction of a vast factory that will produce batteries for electric vehicles.
Chinese firm CATL and the Netherlands-based Stellantis are investing a combined €4bn ($4.7bn; £3.5bn) in the facility. Yao Jing, China's ambassador in Spain, described it as "one of the biggest Chinese investments Europe has ever seen".
Luis Bertol Moreno, mayor of the town, says the area was a logical choice for the project.
"We're in Aragón, where there's wind all year round, there are lots of hours of sunshine, and we are surrounded by wind turbines and solar panels," he says.
"Those [energy sources] will be crucial in generating electricity for the new factory, and I understand that was the key reason for building it here in Figueruelas."
The factory can be seen as vindication of Spain's energy model, which prioritises renewable sources. In 2017, renewables contributed just a third of Spain's electricity production, but last year they represented 57%.
By 2030, the government wants them to contribute 81% of electricity output.
Earlier this year, Prime Minister Pedro Sánchez summarised his government's approach as he delivered a riposte to US President Donald Trump's pro-fossil fuel "Dig, baby, dig" slogan. "Green, baby, green," said the Socialist, as he pointed to the benefits of renewable energy.
However, in recent months, Spain's all-in commitment to renewables has come under scrutiny. This was in great part due to an 28 April blackout that left homes, businesses, government buildings, public transport, schools and universities in the dark across Spain and neighbouring Portugal for several hours.
With the government unable to offer a full explanation for the outage, the country's energy mix became a fiercely-debated political issue. Alberto Núñez Feijóo, leader of the conservative opposition, accused the government of "fanaticism" in pursuing its green agenda, suggesting that an over-reliance on renewables might have caused the incident.
Feijóo and others on the right advocated a rethink of the national energy model.
The fact that, a week before the blackout, solar generation in mainland Spain registered a record 61.5% of the electricity mix has fuelled such claims.
Yet the government and national grid operator Red Eléctrica have both denied that the outage was linked to the preponderance of renewable energy sources in Spain.
"We have operated the system with higher renewable rates [previously] with no effect on the security of the system," says Concha Sánchez, head of operations for Red Eléctrica. "Definitely it's not a question of the rate of renewables at that moment."
Ms Sánchez said the blackout was caused by a combination of issues, including an "unknown event" in the system moments before, which saw anomalous voltage oscillations....
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