A comparative study evaluates the effectiveness of anti-graffiti protected surfaces cleaning with various graffiti paints. It presents four commercial anti-graffiti products applied on different substrates. Results showed that the products facilitate cleaning the graffiti, especially on the more porous substrates. "Reflective roofs can reduce the ambient temperature in large cities by approximately1.5 °C." Designing macromolecules with absolute sequence order is a considerable challenge. Researchers report an advanced light-induced avenue to monodisperse functional linear macromolecules via a new photochemical approach. ...