OTTAWACanada’s Supreme Court ruled in favor of the federal government’s carbon pricing policy on March 25, upholding a central pillar of Prime Minister Justin’s Trudeau’s climate plan.

Noting that climate change is a threat to the country as a whole, the country’s top court upheld the legality of the Greenhouse Gas Pollution Pricing Act, which had been challenged by the provinces of Alberta, Saskatchewan and Ontario.

“Parliament has jurisdiction to enact this law as a matter of national concern,” Chief Justice Richard Wagner wrote in the ruling.