Casares, Spain (image) University of New South Wales Share Print E-Mail Caption The white buildings of Casares, Spain, may reduce the temperatures 2-3. How simple, proven and safe geoengineering practices can reduce temperatures by 2-3 degrees C.C during the hottest days. Credit Picture by Francisco Moreno (Unsplash) Usage Restrictions None Share Print E-Mail 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.