The environmental policy of the Stephen Harper government was implemented when Stephen Harper was the Prime Minister of Canada from 2006 to 2015, under two minority governments until 2011 when the Conservative Party of Canada won a majority in the 2011 Canadian federal election. During the term of Stephen Harper, Canada's greenhouse gas emissions decreased from 730 to 723 Mt of carbon dioxide equivalent. In contrast, during the period from 1993 until 2006, under various Liberal governments, Canada's greenhouse gas emissions increased 617 to 730 Mt of carbon dioxide equivalent.