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The Beaufort Sea along Alaska’s north coast is bitter cold, packed with marine life, and underlain with . Since the 1980s, oil companies have targeted a shallow area five miles from shore—between Prudhoe Bay, once North America’s most productive oil field, and the coast of the Arctic National Wildlife Refuge, the largest wildlife refuge in the country—to build an oil and gas production facility, the first in Alaska’s federal waters. But they were stymied by technical problems, ever-expanding budget estimates, and regulatory concerns.

Now, as the Trump administration pursues oil and gas development with fervor, drilling there might finally happen. In October, after Houston-based Hilcorp Energy Company acquired a lease to the land, the Bureau of Ocean Energy Management, or BOEM, , known as the Liberty Energy Project. If Hilcorp decides to go forward with the project, the company will build a nine-acre gravel island six miles offshore to base their operations and bury a seven-mile pipeline under the seafloor to connect the extracted oil and natural gas to the Trans-Alaska Pipeline System.

To gain approval for major energy projects like this one, U.S. law requires that BOEM take stock of how the project would affect the environment. The resulting document, , details the risks that proposed infrastructure and a potential oil spill might pose to the region’s caribou herds, breeding shorebirds, polar bears, and passing bowhead whales, as well as the project’s impact on water and air quality, including climate change.

However, if you look carefully at the for the Liberty Project (on page 4-52), the agency draws a surprising conclusion: That extracting 120 million barrels of oil from beneath the Arctic Ocean over the project’s 15-to-20-year lifetime would reduce global carbon emissions, and by no small amount. According to the agency, developing Liberty would save more than 25 million metric tons of carbon dioxide—or the equivalent carbon pollution emitted by 5.3 million cars over a year. In other words, the report determines that transporting and dumping gravel in the ocean to construct an artificial island, drilling into the seafloor to capture buried oil, and extracting some 70,000 barrels of the stuff each day at peak production is better for Earth’s climate than doing nothing at all.

“That’s just a crazy, crazy analysis,” says Jeremy Lieb, an attorney at Earthjustice, a non-profit legal firm that focuses on environmental issues. Last month, the Center for Biological Diversity and a host of other conservation groups represented by Earthjustice against the Department of Interior, which oversees BOEM, on the grounds that the agency’s environmental analysis of the Liberty Project distorts the damages associated with drilling and ignores basic economic principles. “It appears to be a convenient way for agencies to rationalize that any individual project will have essentially no effect on global greenhouse gas emissions,” Lieb says.

The use of a model that undersells carbon emissions appears to be a directive coming from inside the Department of Interior. When ���Ϲ��� asked Frances Mann, a BOEM biologist who worked on the environmental impact statement for the Liberty Project, about the climate analysis, she said, “we used the models that we were required to use.”

The BOEM report reasons that in place of oil coming out of the Arctic, nearly the same amount of oil would be produced elsewhere in the world from places with “comparatively weaker environmental protection standards” and “increased emissions from transportation,” according to the federal document.

This assumes that any oil not extracted in the Arctic would be replaced with foreign oil that uses dirtier methods and costs more to transport, ultimately emitting more carbon. That logic requires some economic gymnastics, says Gilbert Metcalf, an economist at Tufts University who specializes in energy and climate policy. “I just don’t find it credible,” he says. It’s more likely that Arctic oil would be replaced by oil from fracked wells in the United States, like those common in North Dakota and Texas, rather than overseas oil, Metcalf says. What’s more, producing oil in the Arctic is no pristine operation—it emits more carbon than oil produced in the Gulf of Mexico, according to , because of the difficulties of extracting oil in such harsh conditions.

The analysis makes another error, says Peter Erickson, a senior scientist at the Stockholm Environment Institute, an international research and policy non-profit organization. Basic economic models show that when more oil is produced in the United States, more oil is bought and combusted internationally. That’s because when there’s more oil on the market, prices drop—simple supply-and-demand economics. The Liberty Project analysis, and others, don’t fully take this effect into account, he says; they ignore the fact that the extraction of fossil fuels actually increases global carbon emissions.

“The underlying assumption is very common,” Erickson says. For years, including before Trump took office, government reports failed to account for the likely increase in consumption. Erickson first in the analysis of the Keystone XL Pipeline, writing in a 2014 Nature Climate Change report that the State Department underestimated the project’s overall emissions—the difference between releasing up to 27 million tons of carbon dioxide annually and up to 110 million tons. “There was this sort of giant blind spot,” Erickson says.

BOEM also miscalculated carbon emissions in its draft analysis of Arctic and Atlantic offshore oil drilling in 2016, he says. After that, though, the agency seemed to learn from its mistakes. In November 2016, found that halting new drilling projects over five years would lower foreign oil consumption by billions of barrels. This could decrease global carbon emissions by up to , Erickson estimates, more carbon than the entire U.S. transportation sector emits in a year.

This argument has held up in court. In 2017, a federal judge struck down another flawed emissions analysis conducted by the Bureau of Land Management on a coal project in Colorado. “She said very specifically [that] it’s irrational to say increase in supply is not going to increase consumption,” Erickson says.

Yet despite increased recognition of the problem, the Liberty Project environmental impact statement relies on debunked reasoning to conclude that developing the site would result in lower carbon emissions. This is an intentional move on the part of the Interior Department, Erickson says. “It’s not a misguided model; it’s a purposeful misuse of the model,” he says. “It’s enabling their decision and their allowance to expand the fossil fuel supply.”

Federal agencies continue to use the same flawed model in analyses of other new energy projects. A draft report detailing how drilling for oil in the Arctic National Wildlife Refuge would impact the environment, released December 20 by the Bureau of Land Management, also failed to account for the global increase in emissions from development. "It appears as if [the Bureau of Land Management] is purposefully obfuscating the question of the global oil market and CO₂ emissions implications," Erickson told ���Ϲ��� over email.

This comes at a time when the world needs to reduce carbon emissions to avoid a climate catastrophe, according to a recent United Nations report—and yet . Halting fossil fuel expansion is the only way to reduce carbon emissions in a meaningful way, Erickson says. “The climate problem is a fossil fuel problem. There’s no debate around that.”

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