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Wind has been powering the economy for centuries. Long before giant aluminum windmills were fed into the electric grid, wind filled the sails of ships plying the open seas. French businessman Guillaume Le Grand wants to bring back wind-powered shipping, and his company is already shipping French goods to North America that way. However, the approach will work better for some products than others, according to Vice-Dean of Faculty Saibal Ray. Longer shipping times mean the approach won鈥檛 work for many perishable items. Coffee is one product that could lend itself to shipping by wind-powered vessel, Ray tells CBC News. It keeps well and demand for the product is consistent throughout the year.