Greenwire : Toyota Motor Corp., maker of the world’s top-selling hybrid Prius, has unveiled a larger, more expensive hybrid-only model in an effort to make the green technology more mainstream. The “Sai” sedan will be Toyota’s second hybrid-only model and will be sold only in Japan beginning in December with a monthly sales target of about 3,000. The Sai gets about 54 miles per gallon under Japanese mileage-test conditions, compared to the smaller Prius’ 90 miles per gallon. The Sai will sta
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