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<p>Regardless of the hopes of many environmentalists, Lynn Scarlett doesn&rsquo;t anticipate that any federal climate change legislation will pass for at least five years -- probably longer. But she does think that a lot can happen in the marketplace and laboratory to address global warming. And she sees regional innovations -- like Vermont&rsquo;s push for &ldquo;smart grid&rdquo; electricity delivery -- as a key trend.</p>