Greenhouse gas mitigation in agriculture

Pete Smith, Daniel Martino, Zucong Cai, Daniel Gwary, Henry Janzen, Prem Kumar, Bruce McCarl, Stephen Ogle, Frank O'Mara, Clive Rice, Bob Scholes, Oleg Sirotenko, Mark Howden, Tim McAllister, Genxing Pan, Vladimir Romanenkov, Uwe Schneider, Sirintornthep Towprayoon, Martin Wattenbach, Jo Smith

Research output: Contribution to journalLiterature review

1229 Citations (Scopus)

Abstract

Agricultural lands occupy 37% of the earth's land surface. Agriculture accounts for 52 and 84% of global anthropogenic methane and nitrous oxide emissions. Agricultural soilsmay also act as a sink or source for CO2, but the net flux is small. Many agricultural practices can potentially mitigate greenhouse gas (GHG) emissions, the most prominent of which are improved cropland and grazing land management and restoration of degraded lands and cultivated organic soils. Lower, but still significant mitigation potential is provided by water and rice management, set-aside, land use change and agroforestry, livestock management and manure management. The global technical mitigation potential from agriculture ( excluding fossil fuel offsets from biomass) by 2030, considering all gases, is estimated to be approximately 5500-6000 Mt CO2-eq. yr(-1), with economic potentials of approximately 1500-1600, 2500-2700 and 4000-4300 Mt CO2-eq. yr(-1) at carbon prices of up to 20, up to 50 and up to 100 US$ t CO2-eq.(-1), respectively. In addition, GHG emissions could be reduced by substitution of fossil fuels for energy production by agricultural feedstocks (e.g. crop residues, dung and dedicated energy crops). The economic mitigation potential of biomass energy from agriculture is estimated to be 640, 2240 and 16 000 Mt CO2-eq. yr(-1) at 0-20, 0-50 and 0-100 US$ t CO2-eq.(-1), respectively.

Original languageEnglish
Pages (from-to)789-813
Number of pages25
JournalPhilosophical Transactions of the Royal Society of London. Series B: Biological sciences
Volume363
Issue number1492
DOIs
Publication statusPublished - 27 Feb 2008

Keywords

  • greenhouse gas
  • agriculture
  • mitigation
  • cropland management
  • grazing land
  • soil carbon
  • soil carbon sequestration
  • nitrous-oxide emissions
  • rice-growing period
  • methane emissions
  • organic-carbon
  • climate-change
  • dairy-cows
  • land-use
  • cattle manure
  • coconut oil

Cite this

Smith, P., Martino, D., Cai, Z., Gwary, D., Janzen, H., Kumar, P., McCarl, B., Ogle, S., O'Mara, F., Rice, C., Scholes, B., Sirotenko, O., Howden, M., McAllister, T., Pan, G., Romanenkov, V., Schneider, U., Towprayoon, S., Wattenbach, M., & Smith, J. (2008). Greenhouse gas mitigation in agriculture. Philosophical Transactions of the Royal Society of London. Series B: Biological sciences, 363(1492), 789-813. https://doi.org/10.1098/rstb.2007.2184