The EnergyFog site uses Flash technology to display the graphs in animated form. If, as it seems, you don't have the required Shockwave plug-in, why not take a few minutes to download it? You can do this by clicking on the icon on the right. After installation you can click here to browse the interactive sections. If, however, you don't wish to take this course, you can nevertheless see a still-images version of the site by clicking here.