Environmental Concern Has  Storied History of Going In and Out of Style
 The last  few years have consumers switching to energy-efficient light bulbs and  trading their SUVs for Priuses, a cliché  normally reserved for fashion magazines has made its way into nightly newscasts  and daily newspapers: Green is the new  black. 
 A 2006 PowerPoint presentation -- won Al Gore a nobel prize and ushered in an  unprecedented era of environmental media. The next thing you knew magazines  published green issues (Vanity Fair, Domino), actors waxed poetic about reducing  carbon emissions (Leonardo DiCaprio) and musicians rocked out on a global scale  under the auspices of "saving ourselves" from global warming (Live Earth).  
 But are Americans  experiencing "green fatigue"? The ratings for Live Earth, which  was billed as a must-see event, were dismal. The American broadcast drew just  2.7 million viewers, making it the least-watched U.S.  program on Saturday night. Despite its undeniable entrenchment in  pop culture and media, some experts say that the  current incarnation of the green movement is just another "We Are the  World" moment that consumers and businesses won't be able to  sustain over the long term. 
 "It's a very difficult thing  to change culture," Marshal Cohen, chief industry analyst for NPD Group, told  ABCNEWS.com, and Ikea charging 5 cents for carrying its plastic bags out of the  store instead of bringing in your own isn't going to do it, he said.  
 GREEN" ...  not going to sustain itself," he said. "It will truly become a lifestyle  of businesses and consumers, but it's not going to be done with the glamour and  gusto that it's done with today."
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