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The GWP-IOBC/GHG indicator includes all contribution to GWP except that emissions and uptake of biogenic carbon,
including temporary stored in products and packaging (as in Table 9 in EN 15804:2012+A2:2019), are set to zero (i.e. direct balanced out while
other biogenic substances like methane etc has a characterisation factor and therefore accounted for as greenhouse gases). This indicator is often
the default in LCA-software in the past and has in the EN 15804 standardisation process been known as "+/- 1 kg biogenic CO2 = 0 kg CO2e, or just
0/0". In published standards, it is described as type 2 in EN 16760.
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