The Willow project is a $6 billion proposal from ConocoPhillips' (COP.N) to drill oil and gas in Alaska. It would be located inside the National Petroleum Reserve-Alaska, a 23 million-acre (93 million-hectare) area on the state's North Slope that is the largest tract of undisturbed public land in the United States.

 It is said doing so could produce up to 180,000 barrels of oil a day, which is around 1.5 per cent of the total U.S. oil production. It would represent the biggest US oil field in decades. The Willow Project would produce the equivalent of more than 278 million tonnes (306 million short tonnes) of greenhouse gases over its 30-year life. This is roughly equal to the combined emissions from two million passenger cars over the same time period.