A dispute over environmental approval of oil, natural gas and forestry projects is headed for the Supreme Court of Canada following an Alberta verdict that the federal government violated the national constitution with its 2019 green new deal legislation.

The case is to be appealed, said Prime Minister Justin Trudeau. The Alberta Court of Appeal rejected his administration’s Impact Assessment Act (IAA) as interference with the constitutional division of powers that “allows the federal government to essentially render worthless the natural resources of individual provinces by stopping their development.” The regulation went into effect in August 2019.

A majority opinion by four of five judges on an appeal court panel said, “the IAA raises an issue of fundamental fairness....