On November 22, 2015, Notley unveiled Alberta's updated climate change strategy, in time for the COP 21 conference in Paris. In doing so, Notley acted upon one of the NDP's central campaign promises: for years, the NDP had criticized the former PC government's inaction on the climate change file. The plan was described in multiple media outlets as bold and far-reaching. This policy shift came about partly because of the characterization of Alberta oil as 'some of the dirtiest in the world' by US President Barack Obama, which the Premier likened to a "kick in the teeth".