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Earthjustice President Abigail Dillen describes Rep. Raúl M. Grijalva as a "giant in the environmental movement" who championed the right to clean air, water, and a healthy environment. The statement highlights his legislative contributions, specifically the Environmental Justice for All Act, and his local efforts to combat TCE pollution in South Tucson and protect lands surrounding the Grand Canyon.

On August 8, President Biden designated the Baaj Nwaavjo I’tah Kukveni – Ancestral Footprints of the Grand Canyon National Monument, providing permanent protection for nearly a million acres of land against uranium mining and industrial threats. This designation replaces a temporary 20-year ban on new mining claims that was set to expire in 2032. The monument protects ancestral homelands of multiple Native Tribes, safeguards the Colorado River watershed—which provides water for 40 million people—and preserves biodiversity, including the critically endangered California condor. While the designation prevents new claims, some existing mines in the region may still operate.

Mighty Earth opposes the Trump administration's removal of protections from millions of acres of US public lands and waters, warning that companies engaging in extractive activities in these areas face risks of stranded assets, legal challenges, and public backlash. The statement calls for companies and banks to adopt policies against new or expanded commercial activity on protected or formerly protected federal lands.

The Mexican gray wolf (Canis lupus baileyi) is one of North America's most endangered mammals, with a wild population of only 113 individuals as of February 2017. Historically found across the southwestern U.S. and Mexico, the subspecies was nearly eliminated by the livestock industry and government agents. Current recovery efforts are hampered by poor genetic diversity, as all existing wild wolves descend from just seven captive ancestors. Earthjustice argues that the U.S. Fish and Wildlife Service's 2017 Recovery Plan is flawed because it limits wolves to inadequate habitats, fails to provide sufficient wild releases, and ignores scientific recommendations to establish three interconnected populations totaling at least 750 individuals across Arizona, New Mexico, the Grand Canyon, and southern Colorado.

Earthjustice represented the Moapa Band of Paiutes in litigation against the Reid Gardner coal plant in Nevada. The plant emitted soot, sulfur dioxide, and nitrogen oxides, which caused haze in Zion and the Grand Canyon national parks and posed health risks to the Moapa Paiute community. The litigation sought a 90 percent reduction in nitrogen oxide emissions through updated technology, resulting in the plant owners choosing to shut down the facility in 2013.

In 2012, the U.S. Interior Secretary implemented a 20-year ban on new uranium mining claims across a million-acre area surrounding Grand Canyon National Park to protect the watershed, wildlife, and local communities, including the Havasupai Tribe. Earthjustice is intervening in consolidated lawsuits filed by the mining industry to overturn this ban. A U.S. District Judge in Arizona has already rejected industry claims that the Interior Department lacked the authority to ban claims on land parcels exceeding 5,000 acres.

Four conservation groups—Friends of the Earth, the National Parks Conservation Association, Natural Resources Defense Council, and The Wilderness Society—condemn a secret policy rewrite by Paul Hoffman, deputy assistant secretary of the Department of Interior. They argue the proposal departs from the stewardship ethic of the National Park Service and could harm parks such as Yellowstone and the Grand Canyon.