Justia Environmental Law Opinion Summaries

The Environmental Protection Agency (EPA) conducted a periodic review of the national ambient air quality standards (NAAQS) for nitrogen oxides, sulfur oxides, and particulate matter, as required by the Clean Air Act. After an extensive eleven-year process, EPA decided to retain the existing standards for nitrogen oxides and particulate matter, while lowering the secondary standard for sulfur oxides. EPA also issued a memorandum explaining its view that the new rule would not change air quality or emissions and thus would have no effect on endangered species or their habitats.Previously, EPA published its proposed rule in April 2024, followed by the final rule in December 2024. The agency’s no-effect determination stated that the revisions would not trigger additional emissions reductions or affect listed species. The Center for Biological Diversity (CBD) challenged EPA’s rule, arguing that the agency violated the Endangered Species Act (ESA) by failing to consult with federal wildlife agencies before issuing the rule. CBD asserted that ongoing and cumulative pollutant effects could harm species, and that EPA’s effects determination was both arbitrary and untimely.The United States Court of Appeals for the District of Columbia Circuit reviewed the case. The court found that CBD had standing to bring the challenge, but ultimately determined that EPA’s no-effect finding was reasonable and not arbitrary or capricious. The court explained that the rule would not cause any changes to air quality or emissions, and thus would not trigger consultation obligations under the ESA. The court also held that EPA’s timing of the effects determination was appropriate under regulatory requirements. The main holding is that EPA reasonably determined the rule would have no effect on protected species or critical habitat, and the petition for review was denied. View "Center for Biological Diversity v. EPA" on Justia Law

Venture Global CP2 LNG and Venture Global CP Express sought authorization from the Federal Energy Regulatory Commission (FERC) to construct and operate a liquefied natural gas (LNG) export terminal and an 85-mile pipeline in Louisiana. FERC’s review included extensive environmental analysis in compliance with the National Environmental Policy Act (NEPA), resulting in an Environmental Impact Statement (EIS) and a Supplemental EIS (SEIS). Both assessments concluded that, with recommended mitigation measures, the project’s environmental impacts, including those on air quality and the commercial fishing industry, would not be significant.Individuals and advocacy groups challenged FERC’s authorization, raising eleven alleged errors under the Natural Gas Act (NGA) and NEPA. After FERC’s initial order in 2024, the challengers sought rehearing. FERC partially granted rehearing to address concerns raised by recent D.C. Circuit decisions and directed additional environmental review, which led to the SEIS. The SEIS found no exceedances of relevant air quality standards for the terminal and compressor station. FERC reaffirmed its authorization in 2025, and subsequent rehearing requests were denied. The challengers then petitioned the United States Court of Appeals for the District of Columbia Circuit for review.The United States Court of Appeals for the District of Columbia Circuit held that FERC’s interpretation and application of the NGA was lawful and not arbitrary, emphasizing the presumption in favor of terminal authorization under Section 3, absent an affirmative showing of inconsistency with the public interest. The court found FERC’s NEPA analysis reasonable, deferring to FERC’s use of established air quality standards and its reliance on expert agency data. The court also upheld FERC’s treatment of cumulative impacts and harm to commercial fisheries as sufficiently addressed and explained. The petitions for review were denied in full. View "For a Better Bayou v. FERC" on Justia Law

The Export-Import Bank of the United States (Eximbank) agreed to lend up to $5 billion to support the development of a major liquefied natural gas project in Mozambique. After insurgent attacks in the project area halted operations, Eximbank approved an amendment in 2025 to allow disbursement of funds on a revised schedule. Two environmental organizations, Friends of the Earth U.S. and Justiça Ambiental, argued that Eximbank’s actions violated statutory requirements by failing to provide a notice-and-comment period or disclose certain economic and environmental analyses before approving the amendment. The organizations claimed the project’s restart would intensify local conflict, cause environmental harm, and impair their ability to serve affected communities.The United States District Court for the District of Columbia denied the plaintiffs’ motion for a preliminary injunction. The court found that the plaintiffs were unlikely to show standing for most of their claims, including lack of a notice-and-comment period and diversion of organizational resources. However, the district court concluded they had a substantial likelihood of standing on an informational injury theory relating to Eximbank’s failure to provide environmental information, but determined the plaintiffs had not shown a likelihood of success on the merits for any of their claims.The United States Court of Appeals for the District of Columbia Circuit reviewed the denial of the preliminary injunction. The court affirmed the district court’s decision. It held that the plaintiffs failed to establish organizational standing because their alleged injuries were either not particularized or too attenuated. The court concluded the plaintiffs demonstrated a substantial likelihood of informational standing for environmental information but failed to show a likelihood of success on the merits, because NEPA does not apply to projects with effects entirely outside U.S. jurisdiction and Eximbank’s disclosure obligations were not triggered. The denial of the preliminary injunction was therefore affirmed. View "Friends of the Earth v. Export-Import Bank" on Justia Law

Two synthetic chemicals, PFOA and PFOS—members of the PFAS group often called “forever chemicals”—have been widely used since the 1940s and are highly persistent in the environment and the human body. Scientific studies have linked exposure to these chemicals to serious health conditions, including cancer and developmental delays. In 2024, the Environmental Protection Agency (EPA) designated PFOA and PFOS as “hazardous substances” under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), which governs the cleanup of hazardous substances and allows for cost recovery from polluters.This designation was challenged by seven industry groups representing entities that use, transport, or discharge PFOA and PFOS. The challengers argued that EPA misinterpreted CERCLA’s standard for designating hazardous substances, failed to provide adequate notice regarding its cost-benefit analysis, and acted arbitrarily and capriciously by regulating in the face of scientific and economic uncertainties. They also argued that the designation violated the Administrative Procedure Act and constitutional doctrines.The United States Court of Appeals for the District of Columbia Circuit reviewed the case. The court found that EPA acted within its statutory authority: CERCLA allows EPA to designate substances that “may present substantial danger” upon release, and the agency’s interpretation of “may” as requiring only the possibility, rather than certainty, of substantial harm was consistent with statutory text and precedent. The court concluded that EPA provided adequate notice and opportunity for public comment regarding its cost-benefit analysis, and that the agency’s rulemaking was neither arbitrary nor capricious. The court also held that the agency’s actions did not violate constitutional doctrines. Accordingly, the court denied the petitions for review, upholding EPA’s designation of PFOA and PFOS as hazardous substances. View "Chamber of Commerce v. EPA" on Justia Law

The case centers on the interpretation of a provision in the Endangered Species Act (ESA) related to how the U.S. Fish and Wildlife Service (the Service) can extend protections to species based on their similarity in appearance to listed endangered or threatened species. In 2019, the Service listed various subspecies and distinct population segments (DPS) of the scarlet macaw as endangered or threatened. It used its authority under the ESA to treat one population segment as threatened due to its similarity in appearance to listed groups. However, it did not conduct a "similarity of appearance" analysis for a population segment that was already listed as threatened, which would potentially have resulted in stronger protections.A lawsuit was filed challenging the Service’s interpretation, arguing that the ESA requires the Service to consider whether a threatened population should be treated as endangered due to its resemblance to an endangered group. The United States District Court for the District of Columbia agreed with the challengers. It found that the Service’s reading of the relevant statutory provision was flawed and that the Service acted arbitrarily and capriciously under the Administrative Procedure Act by not performing the analysis for the already-listed threatened segment. The District Court partially granted summary judgment for the challengers, ordered remand for further explanation, and set parameters for that remand in a later order, after which the Service filed this appeal.The United States Court of Appeals for the District of Columbia Circuit reversed the District Court’s decision. The appellate court held that the statutory text of the ESA only authorizes the Service to treat "unlisted" species as endangered or threatened based on similarity of appearance, not species that are already listed. The court found the Service’s longstanding interpretation, regulatory practice, and the statute’s legislative history supported this reading. Thus, it ruled that the Service did not act arbitrarily or capriciously in declining to conduct the analysis for an already-listed species. View "Friends of Animals v. Williams" on Justia Law

President Trump, without congressional approval or proper consultation, demolished the White House East Wing over three days in October 2025 to build a privately funded 90,000 square-foot ballroom. The National Park Service’s environmental assessment acknowledged that the project would cause permanent and adverse impacts on President’s Park’s historical landscape, disrupting architectural integrity and historical continuity. The National Trust for Historic Preservation, a congressionally chartered organization with longstanding ties to President’s Park, challenged the construction, citing irreparable harm to the historic, aesthetic, and cultural interests of its members.The United States District Court for the District of Columbia first denied a temporary restraining order, relying on government assurances about the timing and separability of underground and above-ground work. Later, after the National Trust amended its complaint and renewed its request, the district court issued a preliminary injunction against above-ground ballroom construction, but exempted below-ground work and measures necessary for safety and security. The court found both statutory (APA) and ultra vires claims likely to succeed, concluding that neither the President nor the National Park Service had congressional authority for such dramatic alterations.The United States Court of Appeals for the District of Columbia Circuit affirmed the district court’s modified preliminary injunction. The court held that Congress exercises exclusive control over federal property, including the White House, under the Property and District Clauses. Statutory language and appropriations history did not authorize unilateral demolition and replacement of the East Wing with a privately funded ballroom. The court ruled that the National Trust had associational standing, that the Trust was likely to succeed on the merits, and that the balance of equities and public interest favored the injunction. The court vacated its prior administrative stay and stayed its ruling for fourteen days to permit further review. View "National Trust for Historic Preservation in the United States v. NPS" on Justia Law

Several environmental organizations challenged a rule issued by the Environmental Protection Agency (EPA) that modified how the agency determines whether a stationary source of air pollution requires a permit for modifications under the Clean Air Act’s New Source Review (NSR) program. The core factual issue concerned whether, in assessing if a physical or operational change at a facility triggers the need for an NSR permit, the EPA may consider both emission increases and decreases attributable to a single project (“project emissions accounting”) at the initial step of the permitting process.Previously, the EPA used a two-step process: Step One evaluated whether a proposed project would itself cause a significant emissions increase, and Step Two determined whether any source-wide emissions decreases would offset that increase. The challenged rule allowed for netting both increases and decreases within a single project at Step One. Petitioners argued that this change would allow regulated entities to avoid NSR by aggregating unrelated activities and relying on emissions decreases that were not contemporaneous with increases.The United States Court of Appeals for the District of Columbia Circuit reviewed the petitions after several environmental groups sought judicial review following the EPA’s adoption of the project emissions accounting rule and related interpretive guidance. The court found that at least one petitioner had standing based on alleged injury from increased emissions at a specific facility. The court held that the EPA’s rule was not contrary to law and did not violate the Clean Air Act, as it consistently applied the statutory definition of “modification” and fell within the agency’s reasonable interpretive discretion. The court further held that the rule was not arbitrary or capricious, finding the EPA’s explanations for its approach to project aggregation and recordkeeping requirements sufficient. Accordingly, the court denied the petitions for review. View "Environmental Defense Fund v. EPA" on Justia Law

The case concerns a challenge brought by two environmental organizations to the Nuclear Regulatory Commission’s (NRC) 2024 revision of its Generic Environmental Impact Statement (GEIS), which is used to evaluate the environmental effects of renewing operating licenses for nuclear power plants. The petitioners argued that the NRC inadequately considered how aging reactor components and the impacts of climate change could increase the risk of severe nuclear accidents, which in turn could have significant environmental consequences.Previously, the NRC revised its GEIS to generically determine that the environmental risks from “severe accidents” at nuclear plants during license renewals were “small,” relying on updated data and a conservative risk analysis. This revision classified most severe accident risks as “Category 1,” meaning they did not require further plant-specific analysis unless new and significant information arose. The NRC also determined that plants that had previously completed an analysis of severe-accident mitigation alternatives (SAMAs) did not need to repeat that process unless new circumstances warranted it. The petitioners sought review in the United States Court of Appeals for the District of Columbia Circuit, challenging these determinations.The United States Court of Appeals for the District of Columbia Circuit reviewed the NRC’s actions under the Administrative Procedure Act’s arbitrary-and-capricious standard, which is deferential to agency expertise in matters of environmental impact analysis. The court found that the NRC had reasonably considered both aging and climate change as factors influencing accident risk, explained its reliance on regulatory oversight and conservative assumptions, and provided adequate opportunity for site-specific review if new information emerged. The court held that the NRC’s generic analysis and procedures did not violate the National Environmental Policy Act or the Administrative Procedure Act, and it denied the petition for review. View "Beyond Nuclear, Inc. v. NRC" on Justia Law

A regional airport in Connecticut faced operational challenges due to a short runway and an outdated, flood-prone terminal. To address these issues, the airport authority proposed a project to extend the runway by about 1,000 feet and construct a new terminal. The authority also planned, in its long-term Master Plan, to upgrade taxiways, but those upgrades were not part of the immediate project seeking final approval. The expansion aimed to allow full-capacity flights for common aircraft and improve passenger facilities.The Federal Aviation Administration (FAA) provided conditional approval for all projects in the Master Plan but granted final approval only for the runway extension and new terminal. The FAA conducted an environmental assessment (EA) for these two elements, concluding there would be no significant environmental effects, and thus did not prepare a full environmental impact statement (EIS). The EA included projections for increased passenger enplanements, consideration of air pollution, and mitigation measures for flooding and wetlands. The FAA determined the taxiway upgrades were not part of the current project because they were not expected to be pursued within five years and had independent utility.Petitioners, an environmental group and a town, challenged the FAA's approval in the United States Court of Appeals for the District of Columbia Circuit. They argued the FAA violated the National Environmental Policy Act (NEPA) in several ways, including improper segmentation of the project, failure to consider cumulative effects, and inadequate analysis of environmental impacts. The Court applied a highly deferential standard of review, consistent with Supreme Court precedent in Seven County Infrastructure Coalition v. Eagle County, and found the FAA acted reasonably in its project definition, environmental analysis, and mitigation measures.The Court denied the petitions for review, holding that the FAA’s approval complied with NEPA’s procedural requirements and was not arbitrary or capricious. View "Save the Sound, Inc. v. FAA" on Justia Law

This case concerns the Environmental Protection Agency’s (EPA) extension of compliance deadlines for steel mills to meet hazardous emission standards. The EPA initially issued an interim rule, then a final rule, extending deadlines for various emission controls and monitoring requirements. EPA explained that the original deadlines were technologically infeasible due to unforeseen technical challenges and incomplete data. The revised deadlines allowed steel mills more time—up to three years after the rule’s promulgation date—to comply with standards for emission sources such as bleeder valve openings, bell leaks, slag processing, beaching, and furnace emissions monitoring. EPA also revised the timeline for fenceline monitoring based on delays in developing testing methods.Environmental groups petitioned for reconsideration of the 2024 Rule, citing procedural and substantive objections. EPA first denied the need for reconsideration but later identified issues warranting further review, issuing a stay and an interim rule. After receiving public comments, EPA promulgated a final rule, confirming the extended deadlines and explaining the compliance difficulties. Petitioners challenged both the interim and final rules, arguing that EPA exceeded its authority and failed to set deadlines as expeditiously as practicable under the Clean Air Act.The United States Court of Appeals for the District of Columbia Circuit reviewed the petitions. The court held that EPA’s revised compliance deadlines were consistent with the Clean Air Act and adequately explained, distinguishing the rulemaking from prior actions that merely delayed rules for reconsideration. The court determined that EPA had authority to reset deadlines based on substantive, technological challenges. The court dismissed the procedural challenge to the interim rule as moot, since EPA had followed proper procedures in the final rule. The challenge to the fenceline monitoring deadline was also dismissed, as the new and original deadlines had converged. The court denied all other petitions for review. View "Clean Air Council v. EPA" on Justia Law