Nature's Numbers: Expanding the National Economic Accounts to Include the Environment, written by William Nordhaus and Edward Kokkelenberg and published in 1999, examined whether or not to broaden the U.S. National Income and Product Accounts (NIPA) to include natural resources and the environment. The panel, which addressed this question, concluded that extending the NIPA and developing supplemental environmental accounts should be a high priority goals for the U.S., because these would provide useful data on a variety of economic issues and government trends, which entailed both replenishing and extractive activities. One of the major findings of the report is that it is fundamentally necessary for green adjustments to account for instances when natural capital is discovered or replenished, along with general depletive activities.