Canada is facing renewed separatist tensions after the oil-rich province of Alberta moved closer to a potential independence referendum, fueling fears of a major political rupture driven by anger over federal energy and environmental policies.

Premier Danielle Smith announced plans for an October vote that would ask Albertans whether the province should begin the legal process toward a binding referendum on leaving Canada, despite insisting she personally supports remaining within the country.

The move prompted Prime Minister Mark Carney to declare Alberta "essential" to Canada's future as Ottawa scrambles to contain growing separatist momentum in the country's energy heartland.

Support for independence in Alberta has climbed to nearly 30%, its highest level on record, amid accusations that federal climate and energy policies have undermined the province's oil-based economy.

"It's time to have a vote, understand the will of Albertans on this subject and move on," Smith said in televised remarks.