Summary - Canada slaps 25% tariffs on C$155 billion of US goods - Trudeau says C$30 billion will take effect on Tuesday - Duties on the remaining C$125 billion in 21 days - PM vows to work with provinces on non-tariff measures OTTAWA, Feb 1 (Reuters) - Canada will retaliate against President Donald Trump'snew tariffs with 25% levies on a raft of U.S. imports, Prime Minister Justin Trudeau said on Saturday, warning Americans that Trump's actions would have real consequences for them. As relations between the long-time allies who share the world's longest land border reach a new low, Trudeau told a news conference he was slapping tariffs on C$155 billion ($107 billion) of U.S. goods. Those on C$30 billion will take effect on Tuesday, the same day as Trump's tariffs, and duties on the remaining C$125 billion in 21 days, he said. Trudeau's announcement came just hours after Trump ordered 25% tariffs on Canadian and Mexican imports and 10% on goods from China, risking a trade war that economists say could slow global growth and reignite inflation.