The livestock sector is one of the planet’s primary causes of resource consumption and environmental degradation. Approximately 99% of meat and other animal products in the United States are from factory farms, and the number of concentrated animal feeding operations (CAFOs) continues to grow. This Article, adapted from Chapter 8 of What Can Animal Law Learn From Environmental Law?, 2d Edition (ELI Press, forthcoming 2020), examines animal agriculture in the U.S and the associated problems.

Section 401 certification and permit conditioning under the Clean Water Act is one of the most significant tools for states to influence federally permitted activities involving discharges into navigable waters. However, states are required to set conditions within one year or they forgo their ability to do so. In practice, the one-year review is difficult for states to meet and led to a common practice known as “withdraw and resubmit” in which states could reset the clock. But in Hoopa Valley Tribe v. Federal Energy Regulatory Comm’n, the D.C.