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:		1.7 ± 0.2 kg CO_2e equivalent / Mcal see this value in other units This is equivalent to... 1.7 ± 0.2 g CO_2e / kcal
HuID:		59491
Relevant Year(s):		2000 – 2010
Summary:		Mass of greenhouse gas (in CO₂ equivalents) emitted per megacalorie of poultry given data from the USDA. . Greenhouse gases considered here include CO₂, CH₄, and N₂O. More information can be found in Fig. 2(C) of the source material.
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. Reported uncertainty is the standard deviation of the quantity given annually-averaged data over the years 2000 — 2010. The reported value was calculated using formal error propagation techniques given the reported uncertainties of the individual datasets. These uncertainties are in moderate agreement with those estimated using Monte Carlo based bootstrapping estimates.
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