CH4: Annual Emission Estimate

Methane (CH4) , another main component in greenhouse gases (GHG). Below here is the estimated number on CH4 release into atmosphere and the main processes releasing it.   

Conversion unit: 1 Teragram = 1 million tonnes.

Livestocks release most CH4, followed by rice farming.  Estimated every year 370 million tonnes of CH4 is released, but this value is dwarfed by CO2 (24 billion tonnes).

source: CDAIC, Annual Estimates of Global Anthropogenic Methane Emissions: 1860-1994


  1. zewt said,

    April 5, 2007 at 2:00 pm

    methane is from our… droppings right?

  2. michelle said,

    April 6, 2007 at 12:25 am

    Haha, i am not sure about human, but at least it was a myth for livestock: “Significant quantities are also produced by cattle—not by flatulence, as in common myth, but 95% through belching.” – wikipedia Methane, or this BBC news:

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