Solar Radiation in Spain (VIDEO) Spanish Foundation for Science and Technology This video is under embargo. Please login to access this video. Caption Solar radiation in Spain has increased by 2.3 percent every decade since the 1980s. Credit SINC Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.