A steep decline in coal cargo shipments from the Twin Ports of Duluth-Superior were off-set by increases in renewable energy supplies like wind turbines last season.
Shipments of coal were at their lowest level in more than 30 years. Port officials say that drop was countered by the 306-thousand freight tons of components for producing wind energy shipped during 2019. Coal is projected to produce less than one-fourth of the world’s electricity by 2050. The U-S Energy Information administration projects power from renewable sources will grow by more than 20 percent during the time period.