In a significant policy shift, the Trump administration has redefined what constitutes “harm” under the Endangered Species Act (ESA), a landmark piece of legislation first enacted in 1973. This change, announced on 10 July, has stirred considerable debate among environmentalists and developers alike.
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The redefinition, outlined by the Interior and Commerce Departments, allows for more extensive access to habitats that are home to endangered or threatened species, which could open the door for increased construction, mining, and other developments in these areas. Previously, “harm” included any modification or degradation of a habitat that could jeopardise the species’ survival or ability to reproduce. The updated interpretation aims to reduce regulatory hurdles and compliance costs for landowners, businesses, and local governments.

Advocates of the new rule, including Secretary of Commerce Howard Lutnick, argue that the change denotes a return to the original purpose of the ESA, which they believe promotes legitimate conservation goals without infringing on economic development. Lutnick contended that previous regulations were overly burdensome, stating, “President Trump is rescinding overly broad and burdensome regulations that have restrained our fishermen for too long.”
Interior Secretary Doug Burgum reiterated this viewpoint, claiming that the ESA had been exploited by federal agencies to hamper lawful land use and disproportionately affect American households and businesses. He argued that the ruling turns routine activities into regulatory hurdles that drive up costs, affecting everyday lives.
However, this reinterpretation has been met with fierce opposition from numerous environmental advocates, who fear it could lead to widespread habitat destruction and jeopardise the survival of many species. Kristen Boyles, an attorney with Earthjustice, sharply criticised the administration’s decision, stating that it undermines protections for endangered species by allowing for habitat modifications that could threaten their existence. “Let’s be clear: there is no support for the Trump administration’s rule—no scientific support, no legal support, no public support,” she asserted.
This ruling comes amid a backdrop of legal precedents dating back to 1995, when the Supreme Court upheld a broader interpretation of “harm.” The court ruled that harm extends beyond direct injury or killing, thereby including any factors that may threaten an endangered species’ habitat. Boyles and other critics argue that this new interpretation could permit significant ecological damage and allow harmful projects to progress unchecked.
Concerns have also been voiced from within state governments. Attorneys general from 16 states have referred to the administration’s rationale as “arbitrary” and “capricious,” indicating widespread legal challenges could be on the horizon. Similarly, Bruce Kreft from the North Dakota Game and Fish Department warned that without healthy habitats, endangered and threatened species would face dire consequences.
Environmentalists have echoed similar sentiments, stressing the importance of maintaining robust protections for all species at risk of extinction. Noah Greenwald, co-director of endangered species at the Centre for Biological Diversity, expressed his apprehensions, saying, “There’s just no way to protect animals and plants from extinction without protecting the places they live.”
This significant alteration in regulatory framework could have far-reaching implications for biodiversity and conservation efforts across the United States. Critics warn that without stringent protections for habitats, many species already on the brink may face additional risks, tipping them closer to extinction.
As the policy unfolds, stakeholders from multiple sectors will undoubtedly continue to debate the merits and pitfalls of this new rule. With court challenges likely inevitable, the future of the Endangered Species Act—and the species it aims to protect—remains uncertain. The Interior and Commerce Departments have not commented further on the backlash but have emphasised that the intention behind the reform is to streamline a process they describe as overly complicated and costly.
As discussions progress, the American public and legal entities will be closely watching the implications of this pivotal change in environmental policy.
