Question: When was the carbon tax introduced in canada?
Disambiguated questions and answers: question: When was the first carbon tax introduced in a canadian territory?
When was the carbon tax first introduced during a federal election in canada, but not implemented?
When was a carbon tax strategy introduced by canada in response to criticism after the Paris Agreement?
answer: June 2007
2008
June 2008
December 2016
Natural Questions answer: 2008 (from the Wikipedia article "Carbon tax")