The Minnesota Trucking Association and others filed a lawsuit in U.S. District court last Friday that alleges that state's mandate to use a 10 percent biodiesel blend was illegal and harmful to their respective industries.An article in the business section of last Saturday's Minneapolis Star Tribune newspaper (http://www.startribune.com/business/300405241.html) caught my attention while sitting in that city's airport very early last Saturday morning. The headline was "Biodiesel Mandate Challenged." The Minnesota Trucking Association and others filed a lawsuit in U.S. District court last Friday that alleges that state's mandate to use a 10 percent biodiesel blend was illegal and harmful to their respective industries. The following are a few...