Question: When was the carbon tax introduced in canada?

Disambiguated questions and answers:
context: No context provided
question: When was the first carbon tax introduced in a canadian territory?
short_answers: June 2007

context: In the 2008 Canadian federal election, a carbon tax proposed by Liberal Party leader Stéphane Dion, known as the Green Shift, became a central issue in the campaign. It would have been revenue-neutral, with increased taxation on carbon being balanced by tax cuts for individual citizens. However, it proved to be unpopular and contributed to the defeat of Liberal Party with its worst share of the popular vote since Confederation. By contrast, the Conservative party, who won the election, had promised to "develop and implement a North American-wide cap-and-trade system for greenhouse gases and air pollution, with implementation to occur between 2012 and 2015."
question: When was the carbon tax first introduced during a federal election in canada, but not implemented?
short_answers: 2008

June 2008
wikipage: Carbon tax

context: No context provided
question: When was a carbon tax strategy introduced by canada in response to criticism after the Paris Agreement?
short_answers: December 2016

Long answers:
knowledge: content: A carbon tax is a tax levied on the carbon emissions required to produce goods and services. Carbon taxes are intended to make visible the "hidden" social costs of carbon emissions, which are otherwise felt only in indirect ways like more severe weather events.
wikipage: Carbon tax

content: In the 2008 Canadian federal election, a carbon tax proposed by Liberal Party leader Stéphane Dion, known as the Green Shift, became a central issue. It would have been revenue-neutral, balancing increased taxation on carbon with rebates. However, it proved to be unpopular and contributed to the Liberal Party's defeat, earning the lowest vote share since Confederation.[168][169][170][171] The Conservative party won the election by promising to "develop and implement a North American-wide cap-and-trade system for greenhouse gases and air pollution, with implementation to occur between 2012 and 2015".[172]
wikipage: Carbon tax

content: By December 2016 the ten provinces and the Canadian government presented their "executive, mitigation and adaptation" strategies towards a clean economy.[33] The "extensive document"—"Pan-Canadian Framework on Clean Growth and Climate Change"—"lean[-ed] heavily on carbon pricing".
wikipage: Carbon pricing in Canada

content: In June 2007, Quebec implemented the first carbon tax in Canada which was expected to generate $2 million annually.
wikipage: Carbon pricing in Canada
long_answer: The first carbon tax, which is a tax levied on the carbon emissions required to produce goods and services, that was introduced in a Canadian territory was in June 2007, when Quebec implemented a carbon tax which was expected to generate $2 million annually. The first carbon tax that was introduced during a federal election was during the 2008 Canadian federal election, when Liberal Party leader Stéphane Dion proposed a carbon tax. It would have been revenue-neutral, balancing increased taxation on carbon with rebates, but it proved to be unpopular and contributed to the Liberal Party's defeat, earning the lowest vote share since Confederation. A carbon tax strategy was again introduced in response to criticism after the Paris agreement in December 2016, when the ten provinces and the Canadian government presented their "executive, mitigation and adaptation" strategies towards a clean economy.