From hogs to HABs: impacts of industrial farming in the US on nitrogen and phosphorus and greenhouse gas pollution.

ABSTRACT: Nutrient pollution and greenhouse gas emissions related to crop agriculture and confined animal feeding operations (CAFOs) in the US have changed substantially in recent years, in amounts and forms. This review is intended to provide a broad view of how nutrient inputs-from fertilizer and CAFOs-as well as atmospheric NH₃ and greenhouse gas emissions, are changing regionally within the US and how these changes compare with nutrient inputs from human wastewater. Use of commercial nitrogen (N) fertilizer in the US, which now exceeds 12,000,000 metric tonnes (MT) continues to increase, at a rate of 60,000 MT per year, while that of phosphorus (P) has remained nearly constant over the past decade at around 1,800,000 MT. The number of CAFOs in the US has increased nearly 10% since 201

SUBMITTER: Glibert PM 

PROVIDER: S-EPMC7416595 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature