Mayor Rahm Emanuel will unveil his FY 2017 budget this morning in the City Council Chambers, which will likely include provisions of a tentative agreement reached with the Chicago Teachers Union late last night. Few other details of the mayor’s budget plan have been revealed, other than the idea of adding a 7-cent tax on plastic bags, according to the Chicago Sun-Times and Chicago Tribune. This added tax would, in theory, add teeth to the existing plastic bag ban by providing an incentive for customers to bring a reusable bag.