A number of people were convicted for acting to stop construction of the Trans Mountain Pipeline expansion in Canada. Two defendants sought leave to raise the common law defense of necessity and for permission to call experts at their trial to discuss climate change and the greenhouse gas consequences of oil sands extraction in Canada. They argued that the pipeline, which is owned by the Government of Canada, constitutes state action threatening citizens' right to a stable climate as protected by Section 7 of the Canadian Charter of Rights and Freedoms. On January 17, 2019, the Supreme Court of British Columbia dismissed the applications. The court concluded that the applicants had not shown that climate change poses an imminent threat as required for the necessity defense.

Following conviction, the activists appealed. The case reached the Court of Appeal for British Columbia (BCCA). On appeal, in a judgment dated Dcember 1st, 2020, the BCCA considered whether the necessity defence should have been permitted. The BCCA rejected arguments based on necessity and constitutional rights, finding that climate change concerns, while significant, did not create a legal justification for breaching court orders. The court noted that the necessity defense requires imminent peril and proportional response, which were not established, and that the Charter claims were framed too broadly to be justiciable. The BCCA concluded that the appellants had reasonable, lawful alternatives, such as public advocacy, lawful protest outside the injunction area, civil litigation, or political and democratic processes. Because a reasonable legal alternative existed, the necessity defence was unavailable. The BCCA therefore dismissed the appeals, and affirmed the convictions.

Subsequent proceedings,  reflected in a long docket history (including many BCSC and BCCA entries between 2019 and 2023, concerned sentencing, multiple contemnor individuals, and enforcement issues. The court imposed escalating sentences over the following years, to deter further breaches, emphasizing the rule of law and the enforceability of court orders.

Trans Mountain Pipeline ULC v. Mivasair

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Trans Mountain Pipeline ULC v. Mivasair - judgment

Filed

Canada

British Columbia

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An aim to achieve a quantifiable outcome within a given time-frame, set by an institution such as a national government.

Policy instruments are techniques or tools used by governing authorities to promote certain policies in order to achieve predetermined goals. Put simply, instruments are how a government tries to achieve its goals, with this taxonomy being focused on national policy instruments.

Risk is the potential for adverse consequences resulting from the dynamic interplay between (climate-related) hazards, exposure, and vulnerability of affected human or ecological systems.

Groups  of people who are adversely affected by climate change or the response to it

A set of principles, processes, and practices that build economic and political power to shift from an extractive economy to a regenerative economy.

Justice is the ethical and political framework that addresses fairness, including issues of responsibility, rights, and structural inequity.

Renewable energy means all forms of energy produced from renewable sources in a sustainable manner.

Fossil fuel is a generic term for non-renewable energy sources such as coal, fossil gas, and oil (including crude oil, and petroleum products), that can be used for electricity and heat generation. Fossil fuels are hydrocarbons formed from pressurised and heated organic material buried over millions of years.

Molecules in the atmosphere that play a key role in the greenhouse effect by trapping heat radiating from Earth’s surface.

Area of the economy in which actors engage in identical or related activities.

In human systems, the process of adjustment to actual or expected climate change and its effects, in order to moderate harm, increase resilience or exploit beneficial opportunities. In natural systems, the process of adjustment to actual climate change and its effects; human intervention may facilitate adjustment to expected climate change and its effects.

The management and allocation of funds, assets and investments to meet various objectives

A ban is a legal action that prevents the sale or supply of a product or service, or that recalls a product from the market. Examples are bans on SF6, greenwashing, fossil fuel advertisement or single-use plastics.

A target to reduce the prevalence of a greenhouse gas over a specific time frame

Either money or something of monetary value is transferred between two or more organisations, people or countries.

Hot temperature extremes are daily maximum temperatures  that were exceeded on average once in a decade or once in 50 years, and includes heatwaves.

The release of heat-trapping gases, primarily from human activities such as burning fossil fuels, agriculture and industry.

A long-lived, colourless gas, chiefly emitted from fossil fuel combustion, deforestation and cement production.

A potent, short-lived greehouse gas, largely released from livestock, fossil fuel extraction and waste management.

Risks to the ecosystem health of the marine environment, including ocean warming, ocean acidification, and ocean deoxygenation, harming biodiversity, species health, ecosystem services, and coastal community livelihoods.

Extreme weather refers to events where a weather variable exceeds (or falls below) a threshold. Meaning it is significantly different from the average or usual weather pattern.

Terrestrial means "of the earth" and relates to the risks to ecological system that includes all living organisms and their interactions within land-based environments, such as forests, grasslands, and deserts.

Social inclusion is the process of improving the terms on which individuals and groups take part in society—improving the ability, opportunity, and dignity of those disadvantaged on the basis of their identity.

Production of electricity and heat from solar irradiation.

Oil is a combustible liquid fossil fuel composed mainly of hydrocarbons, occurring as crude oil and refined into petroleum products such as petrol, diesel and kerosene.

Fossil gas, commonly known as natural gas, is a fossil fuel consisting chiefly of methane with smaller amounts of other hydrocarbons and trace gases, found in underground deposits.

Coal is a combustible sedimentary rock formed from carbonised plant matter, rich in carbon and hydrocarbons, and occurring in several main types including hard coal and brown coal.

People with different national or cultural traditions from the dominant population

Social and cultural groups that share collective ancestral ties to the lands and natural resources where they live, occupy or from which they have been displaced

The activities of industries involved in the production, distribution, and sale of energy, including electricity, gas, and renewables.

Activities that involve planning, designing and building infrastructure, residential, and commercial structures.

This sector involves activities to move goods and people, alongside the storage of products.

Activities of government agencies and institutions that provide public services, enforce laws and manage public resources.

Activities involving the management, development, and sale of property assets.

Slow onset events evolve gradually from incremental changes over many years or from increased frequency or intensity of recurring events. As defined in the Cancun Adaptation Framework (2010), slow onset events include risks and impacts from rising temperatures, desertification, biodiversity loss, land and forest degradation, glacial retreat, ocean acidification, sea level rise, and salinization.

The cryosphere is the frozen part of the Earth—it includes sea ice, glaciers, snow, and ice sheets. It helps regulate the climate and weather by reflecting sunlight. Rising temperatures are causing melting, leading to sea ice loss, glacier collapse, and glacier landslides and avalanches. This threatens the livelihoods of around 700 million people who rely on the cryosphere for food, water security, and cultural practices.

Trans Mountain Pipeline ULC v. Mivasair - judgment

Target

Policy instrument

Risk

Impacted group

Just transition

Renewable energy

Fossil fuel

Greenhouse gas

Economic sector

Adaptation/resilience

Finance