New Brunswick and Ontario's proposals to tax greenhouse gas emissions from heavy industry meet the federal rules in theory but the federal environment minister said they will not have the same impact on climate change.

The Supreme Court of Canada is set to hear appeals in three separate cases to determine if the federal carbon-tax legislation is constitutional or if it encroaches unacceptably on areas of provincial jurisdiction.

The federal government has decreased the carbon tax rebates Canadians can expect in the new year in three provinces that have not adopted carbon pricing models that meet federal requirements.

The Trudeau government is giving the Alberta government a passing grade for its industrial carbon tax.

Premier Blaine Higgs said he's hoping for a decision soon but knows the new federal cabinet has to be in place first.

New York's attorney general is accusing Exxon Mobil of misrepresenting the risks oilsands operations face as governments move to fight climate change.

This comes after the Ontario Court of Appeal ruled in a split decision in June that the federal carbon tax is constitutional because it relates to a matter of "national concern."

The Province will continue to pursue Manitoba's lawsuit against the federal carbon tax, despite losses by Saskatchewan and Ontario in similar cases, says the Premier.

'In the same way that penicillin treats an infection, carbon pricing can help fight climate change.'

On Friday, Ontario’s top court ruled that the Trudeau government is within its rights to impose a carbon pricing system on provinces that do not have their own.