The Human Impacts Database

A collection of useful numbers for quantifying the impacts of the human presence on Earth.

This quantity is a single measurement of the quantity at a given point in time (2000 – 2010).


Value:		≈ 1.6 kg CO₂ equivalent / Mcal
HuID:		56049
Relevant Year(s):		2000 – 2010
Summary:		Mass of greenhouse gas (in CO₂ equivalents) emitted per megacalorie of rice. Greenhouse gases considered include CO₂, CH₄, and N₂O. See Fig. 2(C) of source for more information.
Method:		One CO₂ equivalent is defined as the mass of CO₂ that would have to be emitted to match the 100-year global warming potential of the gas under consideration. For example, one kg of CH₄ has the same 100-year global warming potential of emitting 25 kg of CO₂. No uncertainty estimate is reported for this quantity and should thus be taken as an approximate value.
Source:		Eshel, G., Shepon, A., Makov, T., Milo, R. Land, irrigation water, greenhouse gas, and reactive nitrogen burdens of meat, eggs, and dairy production in the United States. PNAS (2014)
Dataset:		Resource requirements per Mcal of livestock product and staple crops (eshel2014_fig2_data.csv) global resolution
Original Data License:		PNAS Open Access License
Added By:		gchure