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fix: preserve explicitly provided zero carbon intensity #1441

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fix: preserve explicitly provided zero carbon intensity #1441

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a341517
Preserve explicitly provided zero carbon intensity factors
nawaaaaaAaar Oct 5, 2026
57ee053
Merge branch 'master' into fix/zero-carbon-intensity
davidberenstein1957 Oct 9, 2026
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4 changes: 2 additions & 2 deletions codecarbon/core/emissions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -335,7 +335,7 @@ def _global_energy_mix_to_emissions_rate(energy_mix: Dict) -> EmissionsPerKWh:
in Kgs.CO2 / kWh
"""
# If we have the chance to have the carbon intensity for this country
if energy_mix.get("carbon_intensity"):
if energy_mix.get("carbon_intensity") is not None:
return EmissionsPerKWh.from_g_per_kWh(energy_mix.get("carbon_intensity"))

# Else we compute it from the energy mix.
Expand All @@ -353,7 +353,7 @@ def _global_energy_mix_to_emissions_rate(energy_mix: Dict) -> EmissionsPerKWh:
carbon_intensity_for_type = carbon_intensity_per_source.get(
energy_type[: -len("_TWh")]
)
if carbon_intensity_for_type: # to ignore "total_TWh"
if carbon_intensity_for_type is not None: # to ignore "total_TWh"
carbon_intensity += (
energy_per_year / energy_sum
) * carbon_intensity_for_type
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34 changes: 34 additions & 0 deletions tests/test_zero_carbon_intensity.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,34 @@
from unittest.mock import patch

import pytest

from codecarbon.core.emissions import Emissions


@pytest.mark.parametrize("intensity", [0, 0.0, 42.0])
def test_explicit_carbon_intensity_is_used(intensity):
with patch(
"codecarbon.input.DataSource.get_carbon_intensity_per_source_data",
side_effect=AssertionError("Source factors should not be needed"),
):
rate = Emissions._global_energy_mix_to_emissions_rate(
{"carbon_intensity": intensity}
)
assert rate.kgs_per_kWh == intensity / 1000


@pytest.mark.parametrize(
"mix,expected",
[
({"total_TWh": 1, "wind_TWh": 1}, 0.0),
({"total_TWh": 2, "wind_TWh": 1, "coal_TWh": 1}, 0.4),
({"total_TWh": 1, "coal_TWh": 1}, 0.8),
],
)
def test_zero_source_factor_counts_toward_energy_coverage(mix, expected):
with patch(
"codecarbon.input.DataSource.get_carbon_intensity_per_source_data",
return_value={"wind": 0, "coal": 800, "world_average": 475},
):
rate = Emissions._global_energy_mix_to_emissions_rate(mix)
assert rate.kgs_per_kWh == expected
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