Defendants filed a memorandum in support of their motion to stay discovery and proceedings on all “climate change” allegations. The defendants argued that the central factual and legal dispute in Counts I–IX of CLF’s complaint—whether they were required under the current Connecticut General Stormwater Permit to consider climate change risks like sea-level rise and storm surge—has been rendered moot by a draft permit issued by Connecticut’s Department of Energy and Environmental Protection (CT DEEP). That draft permit, released in March 2024 and revised in December 2024, included for the first time an express requirement that permittees evaluate climate resiliency factors in their stormwater pollution prevention plans (SWPPPs). CT DEEP characterized these provisions as “new” and “significant changes” from prior permit language. Defendants argued that this regulatory update confirms that the permit in force at the time of the alleged violations never required consideration of climate change, directly undermining CLF’s claims and making further litigation unnecessary since the draft permit conclusively resolved the issue. Consequently, there was no longer any dispute of material fact. Defendants maintained that a stay would conserve judicial and party resources, as expert discovery would otherwise proceed on issues likely to be legally foreclosed in the coming months once the draft permit is finalized. They claimed that they would suffer irreparable injury and expense if forced to undergo expert discovery on already resolved claims. The motion noted that CLF refused to agree to a joint stay, leading to defendants’ unilateral request. The defendants argued that under controlling precedent and the standards for discretionary stays, the court should pause litigation on the climate-related counts until CT DEEP completed its permitting process.

Citizen suit alleging failures to prepare a bulk storage and fuel terminal in New Haven, Connecticut for the effects of climate change.

Conservation Law Foundation v. Shell Oil Co.

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Court Asked to Stay Climate-Related Claims Pending Final Stormwater Permit Clarification

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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

Codes and standards are regulatory instruments that specify minimum standards to protect health and safety. This ranges from performance standards, which prescribe outcomes while allowing flexibility to achieve compliance, to the more prescriptive approach of technology-specific standards.

Zoning and spatial planning are both methods for guiding the distribution of people and activities in a space, and are regulatory restriction.

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 company that is owned wholly or partially by the state, typically operating in key sectors.

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

Actions or measures to adapt terrestrial systems to climate change.

Actions or measures to adapt freshwater systems to climate change.

Actions to adapt human health, healthcare systems and well-being to climate change.

Actions to adapt and increase the resilience of rural and urban infrastructure and settlements to climate change.

Actions or measures to adapt freshwater, coastal and marine systems to climate change.

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.

A drought is an extended period of unusually dry weather marked by a significant and sustained lack of precipitation, falling below a specific threshold over a large area for more than a month

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.

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.

Activities of industries that extract natural resources, such as mining, oil, and gas, for commercial use.

The activities of industries that transforms raw materials into finished goods through industrial processes.

This sector involves managing waste treatment, sanitation, pollution control and environmental cleanup.

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.

This sector creates and distributes information and entertainment through television, radio, print, and digital platforms.

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

Activities that relate to the production of goods and services from forests.

This sector involves the distribution, treatment, and conservation of water resources.

Climate change can have a range of impacts on technological system. Extreme weather events can cause infrastructure failures like power outages or damage to roads and bridges, as well as the impacts from waste following natural disasters. Human activities also cause technological impacts, such as the risks posed by oil spillage and leaks.

Any substance with chemical properties that can cause physical harm to people or damage the environment, including ammonia, carbon monoxide, phosphine, chlorine, arsenic, cadmium, mercury, pesticides, dioxins, microplastics, benzene, asbestos, aflatoxins, fluoride, methanol, and toxins from marine sources.

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.

Heavy precipitation refers to any form of weather where substances fall from the sky, including rain, snow, sleet, or hail.

Court Asked to Stay Climate-Related Claims Pending Final Stormwater Permit Clarification

Policy instrument

Risk

Just transition

Fossil fuel

Economic sector

Adaptation/resilience

Finance