Supply Chain Greenhouse Gas Emission Factors for U.S. Commodities

This is a release candidate for the v1.4.0 Supply Chain Factors. Following further review, this dataset will be superseded by a final release of v1.4.0. 

Please review and provide your comments in a github disucussion thread that we will provide here:

https://github.com/cornerstone-data/supply-chain-factors/discussions/4

A single Excel file 'SupplyChainGHGEmissionFactorsv1.4.0-rc.1.xlsx' contains sheets:

1. 'CO2e' for the Factors in kg  CO2e (carbon dioxide equivalent) per USD 2023 output of the commodity, where the AR6 GWP-100 values have been applied to each gas and summed
2. 'byGHG' for the Factors in kg (or MMT in limited cases) gas per USD 2023 output of the commodity (before GWP is applied). 

The attached PDF 'About the Supply Chain Greenhouse Gas Emission Factors v1.4.0-rc1.pdf' provided a full description of the background, methods, a quantitative summary of the dataset, use of the dataset, a comparison to the previous version, and an analysis of the correlation between price change and Factor change. 

'SI_RelativeChangefromv1.3.0tov1.4.0inSEFs.xlsx' is supporting information showing relative change in the Factors from the previous version to the current version.

'USEEIOv2.5.1-phoebe-23.rds' is the USEEIO model in native R format used to generate the Factors.