With diesel and gasoline prices hanging steady around $2 a gallon, you probably haven’t given alternative-fueled vehicles much thought. But should you?At first glance, the math doesn’t add up. With CNG (compressed natural gas) selling at $2.11 a gallon at the end of 2015 and gasoline selling at $2.04, driving an alternative-fueled truck can cost you an extra 7 cents a gallon. Add in the higher purchase price (about $7,000), and there appears to be no chance to recoup your financial investment.So why go green? Incentives might be one reason. Government grants can lower the purchase price and tax rebates
