By raising duties on Canadian lumber, the United States is contending that the producers benefit from unfair subsidies and sell products below market value. However, British Columbia Premier David Eby called it an “attack on forest workers and British Columbians” on April 5.  …Harry Nelson, an associate professor of forestry at the University of British Columbia, said the increase stems from Washington’s annual review of its trade remedy findings. “The main reason for the significant increase is that both rates went up, the antidumping especially so.” …Nelson said some companies such as Canfor face a nearly 50 percent tariff and could be unsustainable. “Lumber margins tend to be small — certainly not 50 percent, and it is hard to imagine how Canfor will be able to continue to operate,” he said. “I would expect a curtailment in production, where higher-cost firms may either take temporary downtime or permanently shutter some more mills.”