Computes Scope 1 + Scope 2 greenhouse-gas emissions intensity per
tonne of ore processed, following the GHG Protocol Corporate Standard
and GRI 305-4 / SASB EM-MM-110a.1 disclosure conventions.
Usage
calculate_ghg_intensity(scope1_t, scope2_t, ore_processed_kt)
Arguments
- scope1_t
Numeric. Direct (Scope 1) emissions in tonnes CO2e.
- scope2_t
Numeric. Energy-indirect (Scope 2) emissions in tonnes CO2e.
- ore_processed_kt
Numeric. Ore processed in kilotonnes. Must be > 0.
Value
A named list with metric, total_emissions_t,
ghg_intensity (tCO2e/kt ore), and scope1_share_percent.
Details
Intensity is calculated as:
$$(scope1\_t + scope2\_t) / (ore\_processed\_kt)$$
expressed as tCO2e per kilotonne of ore.
Examples
calculate_ghg_intensity(636000, 342000, 18481)
#> $metric
#> [1] "SDG 13.2 - GHG Emissions Intensity"
#>
#> $total_emissions_t
#> [1] 978000
#>
#> $ghg_intensity
#> [1] 52.92
#>
#> $scope1_share_percent
#> [1] 65.03
#>