ut such high-minded objections sail over the chief source of Live Earth's lameness. The acts were mostly fine. But the outrage and passion felt so prepackaged you half-expected Ludacris (who rapped about the evils of SUVs) to say "this moral outrage is brought to you by GE's 'Ecomagination.' " Indeed, one could say that Live Earth is proof that global warming has jumped the shark, except for the fact that the phrase "jumped the shark" has jumped the shark. Madonna, Genesis, UB40, the Police, Cat Stevens (now Yusuf Islam), Crowded House, Duran Duran — these were among the headliners for...