According to researcher Felisa Smith of the University of New Mexico, 80–90% of large herbivores' methane emissions are released through burps rather than flatulence.
Notes on verification
Direct quote from Felisa Smith confirmed by National Geographic and an independent contemporaneous blog citing the same 2010 study; consistent with broader scientific consensus on ruminant methane emissions from other independent sources. [tier=gold indep_score=0.867 clusters=3 claim_tier=notable]
Sources
- Mammoth-Belch Deficit Caused Prehistoric Cooling? (seed:history_and_archaeology)
- https://blog.everythingdinosaur.com/blog/_archives/2010/06/05/4545196.html (corroboration)
- https://ideas.ted.com/methane-isnt-just-cow-farts-its-also-cow-burps-and-other-weird-facts-you-didnt-know-about-this-potent-greenhouse-gas/ (corroboration)
- https://pmc.ncbi.nlm.nih.gov/articles/PMC10610262/figure/plants-12-03609-f002 (corroboration)