Trudeau’s carbon tax takes effect in industrial heartland

Canadians are about to start paying a carbon tax in what is set to be a key political battleground of the 2019 election.

Beginning Jan. 1, Justin Trudeau’s government will start rolling out a “backstop” price on provinces that don’t have their own levies on emissions. That includes Ontario, an industrial heavyweight whose populist premier scrapped an existing plan, setting up a standoff with the Canadian prime minister.