Canada will appeal last week's decision by a World Trade Organization (WTO) panel to allow the United States to use "zeroing" to calculate lumber anti-dumping tariffs, Foreign Minister Chrystia Freeland said on Monday.

"We firmly believe that the U.S. duties on Canadian softwood lumber are unfair and unwarranted," Freeland said in a statement. "That is why we are challenging these duties at the WTO and under NAFTA."

Canada had launched the technical dispute with the WTO in 2017, saying it would forcefully defend its lumber industry, but last week's long-awaited decision sided with the United States.

Trade tensions between the United States and Canada are heating up again after the two countries together with Mexico agreed on a free-trade deal to replace NAFTA last year...

This was excerpted from the 15 April 2019 edition of CBC News.