U.S. shipments of limestone on the Great Lakes increased 1.8 percent from last year to 2.7 million tons. Limestone cargos were below the month’s 5-year average by 5.8 percent. Year-to-date, the limestone trade stands at 15.9 million tons, a…<p><p>https://www.marinelink.com/news/great-lakes-limestone-trade-increases-543418</p></p>