As for Fox's claim about the ease of shifting to wind, solar and hydropower, "if that was true, we'd be doing it, " said Stephen Ansolabehere, a Harvard University professor who has studied public attitudes toward renewable energy.

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The aromatics mingle in high, medium, and low registers, shifting with the wind, subtle and prickling, like memories you chase but can't quite close in on.

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Although new laws in some states allow trust modifications for shifting circumstances, experts say taxpayers shouldn't push these limits because they could wind up with a trust but without a current tax break.

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