By STEVEN MAIER
Capital News Service
LANSING — The chorus of voices calling for the decommissioning of a twin oil pipeline running across the bottom of the Straits of Mackinac has become more diversified. A network of 18 businesses, all but one based in Michigan, recently announced support for halting use of the controversial pipeline. The Great Lakes Business Network, formed in December, is supported by the National Wildlife Federation and the Groundwork Center for Resilient Communities in Traverse City. It’s also collaborating with the Michigan League of Conservation Voters. Line 5 is a pipeline operated by Enbridge Inc. that runs 645 miles from Wisconsin to Ontario and carries 540,000 barrels of oil per day.