The biggest opportunities to cut U.S. agricultural emissions this decade

Cutting methane emissions is a climate opportunity we can’t afford to miss. It’s the fastest way to slow the rate of warming this decade, and agriculture has a big role to play.

Beef, dairy and rice farming contribute nearly 40% of annual U.S. methane emissions. Enteric emissions from cattle digesting food is the single largest source of methane in the U.S.

Annual agricultural methane emissions can be reduced by 63 MMT of CO₂e by 2030. More than half (34 MMT CO₂e) would come from reducing methane emissions from enteric fermentation using methane-inhibiting feed additives and animal drugs, and improved animal health and genetics. Most of the remaining (29 MMT CO₂e) would come from changing the way manure is stored and managed.

Fertilizer is necessary to grow enough food for a growing population, but too much fertilizer creates nitrous oxide, a potent GHG.

Annual agricultural nitrous oxide emissions can be reduced by 32 MMT CO₂e by 2030. The majority (27 MMT CO₂e) would come from improving nitrogen management on cropland. The rest (8 MMT CO₂e) would come from improving manure management and using nitrification inhibitors on grazing land.

Forests, grasslands and wetlands draw carbon dioxide out of the atmosphere and store it above and below ground. Converting these landscapes into crop land or urban residential developments releases that carbon back into the atmosphere and accelerates warming.

Agriculture and forestry can cut 135 MMT CO₂ annually by 2030.

Immediately halting all development of U.S. forests into urban areas would avoid the emission of 63 MMT CO₂ annually. Immediately halting all conversion of U.S. forests, grasslands and wetlands into cropland would avoid the emission of 55 MMT of CO₂ annually.

A further 17 MMT CO₂ can be avoided annually by reducing emissions from fertilizer manufacturing and distribution, improving electricity efficiency on farms, and reducing fossil fuel used by farm equipment.

Trees are climate superheroes, and they also protect water quality, support biodiversity, and provide recreation and revenue opportunities. Agriculture and forestry can increase their annual carbon dioxide drawdown potential to remove an additional 330 MMT CO₂ through reforestation, improved forest management and agroforestry.

Reforesting land can remove 150 MMT CO₂ from the atmosphere. Improving the management of existing forests — which includes improved management of pests, diseases and fires — would remove and avoid an additional 100 MMT CO₂.

Agroforestry, which integrates trees and shrubs into crop and pastureland, would remove 80 MMT CO₂.