Town halls on the Costa del Sol and throughout Spain will join a global initiative against climate change this weekend.
On Saturday 25 March at 8.30pm (local time in each country), the World Wildlife Fund (WWF) wants governments, organisations and companies around the world to turn off their lights for one hour.
Last year, organisations and governments in 178 countries switched off in support of global efforts to stop climate change.
The lights of public buildings, parks and squares were switched off in more than 300 towns and cities across Spain.
More and more companies in Spain are incorporating sustainable solutions in their processes of productionand resource management, as well as energy-efficient measures in their offices and buildings.
However, the WWF is not only asking large companies and government organisations to participate. They are also appealing to small businesses and individuals to set aside one hour to host events and generally make noise to shine a light on the need for action.
Ten years of action
Coordinated by the WWF and other volunteer organisations, the annual blackout began in the Australian capital of Sydney in 2007.
Ten years later, it has become the largest global initiative in the defence of the environment and the planet.
The WWF claims that climate change is already evident across the globe and especially in regions like the Arctic.
WWF conservation director of Spain, Enrique Segovia, thanked individual authorities and companies for their commitment to Earth Hour.
"Municipalities are a key ally in this unstoppable climate movement and in recent years they have shown that they are willing to lead the way," Segovia said.
Seventy percent of global CO2 emissions responsible for climate change are generated in cities, and their mark upon nature is said to be constantly growing.
Among many emblematic buildings in Spain that will be in darkness for one hour on Saturday is the Alhambra Palace in Granada and Royal Place in Madrid .
The lights of the Casa Fuerte Bezmiliana in Rincón de la Victoria and the Casa de los Navajas in Torremolinos will also be switched off, as will those of numerous town halls and government buildings.