f a tree falls in the forest and nobody hears it, is it because Al Gore and a bunch of elderly rockers organized an all-star stadium gala on its behalf? The colossal flopperoo of Live Earth is a heartening reminder that there are some things too ridiculous even for global pop culture, and one of them is the Rev. Almer Gortry speaking truth to power ballads. Why did so few people feel the urge to rock against climate change? Touchingly enough, the organizers put it down to the weather. Dismal TV ratings? "The BBC blamed the poor figures on Saturday's...