SOURCE: The Guardian
DATE: September 29, 2017
SNIP: Emissions of the greenhouse gas methane from livestock are larger than previously thought, posing an additional challenge in the fight to curb global warming, scientists have said.
Revised calculations of methane produced per head of cattle show that global livestock emissions in 2011 were 11% higher than estimates based on data from the UN’s Intergovernmental Panel for Climate Change (IPCC).
Methane is far more potent than CO2 as a greenhouse gas, capturing more of the sun’s radiative force, but it persists for less time in the atmosphere. Taking that into account, scientists calculate that over a 100-year period the “global-warming potential” of the gas is 28 times greater than for carbon dioxide.