NEW YORK — When Rick Higginbotham tells cash-strapped school boards that they can upgrade their aging mechanical equipment and pay for some or even all of the improvements with the money they’ll save on energy costs, they often tell him it sounds too good to be true. That’s why Higginbotham, a sales executive for ABM, keeps a list of references from previous projects ready for prospective customers to call. /** block-quote style 1 **/ .pquote { background: ...

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