The federal and Ontario governments square off this week in Ontario's top court over Ottawa's contentious climate-change law implementation of the federal carbon tax. At issue is the validity of federal legislation that imposes a charge on industrial polluters, and on gasoline and other fossil fuels in the four provinces that refused to impose their own carbon pricing regimes that meet national standards. For more info, please go to globalnews.ca/news/5167420/ontario-court-challenge-carbon-tax-today/ Subscribe to Global News Channel HERE: bit.ly/20fcXDc Like Global News on Facebook HERE: bit.ly/255GMJQ Follow Global News on Twitter HERE: bit.ly/1Toz8mt Follow Global News on Instagram HERE: bit.ly/2QZaZIB #CarbonTax #Ontario #GlobalNews #DougFord #JustinTrudeau #FederalCarbonTax #onpoli #ontpoli #cdnpoli #environment #climatechange