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This is an incomplete assessment. The following life cycle stages may be missing:
 Usage  End-of-Life 

Carbon Footprint
GHG Emissions Facts
Per one kilogram
Total:0.49 kg CO₂e
490 gCO₂e
Source: literature review[1]

Barley refers to the cereal grain known as barley. The environmental impact information on this page includes greenhouse gas (GHG) emissions that are caused by the materials, production, packaging, and transport life cycle stages. It omits the carbon footprint of retail sale and consumer transport, storage, cooking, and disposal. The average or mean carbon footprint or GHG emissions, attributed to the product life-cycle stages from material production to distribution, are 0.49 kg carbon dioxide equivalent (CO2e) per kilogram.[1]

The principal source for this carbon footprint information is a meta-analysis published in the Journal of Cleaner Production. The data for barley was calculated from 13 global warming potential (GWP) values published in seven life cycle assessment (LCA) studies. The GWP values for barley had a median of 0.43 kg CO2e. These GWP ranged from 0.11 to 0.98 and had a standard deviation of 0.24.[1]

Other products

The table below lists products in the cereal grain category with the lowest total GHG emissions.

Carbon footprints of similar products
Product Total (kg CO2e)
Rye (1 kg) 0.41
Oat (1 kg) 0.44
Barley (1 kg) 0.49
Wheat (1 kg) 0.51

See also

  • Cereal grains - comparison of the GHG emissions from cereal grains.


  1. 1.0 1.1 1.2 S.J. Clune, E. Crossin, K. Verghese. Systematic review of greenhouse gas emissions for different fresh food categories. J. Clean. Prod., 140 (Part 2) (2016), pp. 766–783