The Biden administration on Monday took a first step toward reversing a Trump-era plan aimed at dramatically expanding fossil fuel development in the Alaskan Arctic.

The Bureau of Land Management announced its intention to reinstate a 2013 plan for Alaskas 23-million-acre National Petroleum Reserve adopted during President Barack Obama s administration. The move, if finalized, would ultimately toss out the Trump administrations eleventh-hour rewrite of the plan, which opened an additional 7 million acres of the reserve for potential oil and gas leasing.

This decision reflects the Biden-Harris administrations priority of reviewing existing oil and gas programs to ensure balance on Americas public lands and waters to benefit current and future generations, the bureau said in a statement.

The National Petroleum Reserve, established in 1923 on Alaskas North Slope, is the largest tract of federal land in the country and home to vast oil and gas deposits.

The Obama administration limited oil drilling to approximately half of the reserve, but the industry friendly Trump administration increased the acreage available for development from 11.8 million to 18.6 million. That included opening the door for future drilling around Teshekpuk Lake, in the reserves northeast corner, which is an important habitat for polar bears, caribou and migratory birds.

The BLM noted in its announcement that, although it seeks to revert to the Obama-era plan, it would retain certain more protective lease stipulations and operating procedures for threatened and endangered species from the rewrite during Donald Trump s term.

Kristen Miller, acting executive director of the conservation group Alaska Wilderness League, applauded the Biden team for acting to undo a Trump-era expansion that she said threatened local communities with the diminishment of traditional hunting areas, wildlife displacement, and worsening air quality from oil and gas development.

Now, especially as it prepares to take public comment on its America the Beautiful initiative, we hope the administration recognizes the potential for Americas largest single piece of public land to provide landscape-level protection of ecosystems and sustain healthy and diverse wildlife and habitat for the future, she said in a statement Monday.

The American the Beautiful initiative sets a goal of protecting 30% of Americas lands and waters by 2030 in an effort to combat the climate and extinction crises.