With their enormous size and various luxuries, Hollywood homes may not be the world's most eco-friendly designs. But Treehugger has found seven celebrity homes that buck the trend and go green. The list includes Johnny Depp, Daryl Hannah, Julia Roberts and, of course, Ed Begley. Various green technologies are noted in the article, including a retractable roof in Julia Louis-Dreyfus's home. Also noted is the off-grid home being built by Tricia Helfer. You can follow its construction on her website.