Canadian Federal Court allows climate accountability lawsuit to proceed

A Canadian federal court has rejected the government’s attempt to dismiss a climate accountability lawsuit, allowing the case to proceed to a full hearing on its merits. The lawsuit was launched in June 2026 by three youth applicants—Sophia Mathur, Marie Maltais, and Shirley Barnea—alongside Environmental Defence and the Canadian Association of Physicians for the Environment (CAPE).

The applicants allege that the federal government has weakened or abandoned essential measures within Canada’s 2030 Emissions Reductions Plan, violating the requirements of the Canadian Net-Zero Emissions Accountability Act (CNZEAA).

In an attempt to strike the case, government lawyers argued that the language of the Act, which states the Minister ‘may’ amend an emissions target or plan, does not impose a mandatory obligation to do so. However, Justice Patrick Gleeson rejected this argument, noting that in a legal context, ‘may’ must be interpreted by considering the meaning and purpose of the provision within the legislative scheme. The ruling ensures that the government's compliance with its own climate laws will be scrutinized in court.