Sika USA, a roofing manufacturer, has a series of really good infographics covering a variety of cool roof topics. The latest shows how cool roofs help building owners save significantly on their energy bills by reducing peak demand charges. The graphic clarifies an important but complicated and fairly wonky issue. Check it out on their website here: http://usa.sarnafil.sika.com/en/group/roofing-sustainability/peak-energy-demand-charges.html