Trade negotiations have collapsed, prompting Canada to take action against US goods. Canadian Prime Minister Mark Carney has announced that retaliatory tariffs will be imposed on these goods. The tariffs are set to begin on September 8.

Further details on the tariffs and their impact are available from the source. The announcement comes after the collapse of trade negotiations. The specifics of the tariffs, including the affected goods, are not provided in the initial report.

For more information, readers can refer to the original source.