Politics The U.S. is about to slap countervailing duties on fresh mushrooms grown in Canada, as Canadian growers warn of broader risks to the farming sector on both sides of the border. U.S. pointing to agricultural tax exemptions as justification for countervailing duties Listen to this article Estimated 3 minutes The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. A worker packages mushrooms at the Highline Mushrooms farm in Leamington, Ont., on April 14, 2016. A U.S. Commerce Department fact sheet released this week says that following an investigation, the U.S. government will be hitting Canadian fresh mushrooms with tariffs of between 1.6 and five per cent. (Mark Blinch/Reuters) The U.S. is about to slap countervailing duties on fresh mushrooms grown in Canada, as Canadian growers warn of broader risks to the farming sector on both sides of the border. A U.S.…