In the current web service, a lot of interactive and multimedia
contents are used for delivering information and entertainments.
In particular, Adobe Flash, a Rich Internet
Application (RIA) technology, is popular for publishing contents,
advertisements, and multimedia on the web. Flash is
widely accepted on many websites, because it provides attractive
user interfaces, including animation, video, and interactivity
for web pages. However, Flash has significant influence
on the energy consumption indebted to its resourceintensive
characteristics and its broad usage. In this paper,
we investigate how energy can be wasted by heavy contents
on websites, and explain the projected global energy consumption
of web contents. Based on an energy consumption
rating model for websites, we present how we can save energy
if we modify the web content format without any change in
software or hardware.