diff --git a/costs/co2_emission.py b/costs/co2_emission.py
deleted file mode 100644
index 12e04f8..0000000
--- a/costs/co2_emission.py
+++ /dev/null
@@ -1,80 +0,0 @@
-"""
-CO2 emission module
-SPDX - License - Identifier: LGPL - 3.0 - or -later
-Copyright © 2023 Project Coder Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
-"""
-
-from hub.city_model_structure.building import Building
-import hub.helpers.constants as cte
-
-
-class Co2Emission:
-  """
-  Cost class
-  """
-
-  def __init__(self, building: Building, emissions_factor=None):
-    if emissions_factor is None:
-      emissions_factor = {cte.GAS: 1,
-                          cte.ELECTRICITY: 1,
-                          cte.WOOD: 1,
-                          cte.DIESEL: 1,
-                          cte.RENEWABLE: 0}
-    self._emissions_factor = emissions_factor
-    self._building = building
-
-  @property
-  def building(self) -> Building:
-    """
-    Get current building.
-    """
-    return self._building
-
-  @property
-  def operational_co2(self) -> dict:
-    """
-    Get operational_co2
-    :return: dict
-    """
-    results = {}
-    for energy_system in self._building.energy_systems:
-      fuel_type = energy_system.generation_system.generic_generation_system.fuel_type
-      for demand_type in energy_system.demand_types:
-        results_by_time_period = {}
-        if str(demand_type).lower() == str(cte.HEATING).lower():
-          for time_period in self._building.heating_consumption:
-            values = []
-            for value in self._building.heating_consumption[time_period]:
-              values.append(value * self._emissions_factor[fuel_type])
-            results_by_time_period[time_period] = values
-        if demand_type == cte.COOLING:
-          for time_period in self._building.cooling_consumption:
-            values = []
-            for value in self._building.cooling_consumption[time_period]:
-              values.append(value * self._emissions_factor[fuel_type])
-            results_by_time_period[time_period] = values
-        if demand_type == cte.DOMESTIC_HOT_WATER:
-          for time_period in self._building.domestic_hot_water_consumption:
-            values = []
-            for value in self._building.domestic_hot_water_consumption[time_period]:
-              values.append(value * self._emissions_factor[fuel_type])
-            results_by_time_period[time_period] = values
-        results[demand_type] = results_by_time_period
-
-    results_by_time_period = {}
-    for time_period in self._building.lighting_electrical_demand:
-      values = []
-      for value in self._building.lighting_electrical_demand[time_period]:
-        values.append(value * self._emissions_factor[cte.ELECTRICITY])
-      results_by_time_period[time_period] = values
-    results[cte.LIGHTING] = results_by_time_period
-
-    results_by_time_period = {}
-    for time_period in self._building.appliances_electrical_demand:
-      values = []
-      for value in self._building.appliances_electrical_demand[time_period]:
-        values.append(value * self._emissions_factor[cte.ELECTRICITY])
-      results_by_time_period[time_period] = values
-    results[cte.APPLIANCES] = results_by_time_period
-
-    return results
diff --git a/tests/unit_tests.py b/tests/unit_tests.py
index 2ee80a5..259b426 100644
--- a/tests/unit_tests.py
+++ b/tests/unit_tests.py
@@ -17,7 +17,7 @@ from hub.helpers.dictionaries import Dictionaries
 
 from costs.cost import Cost
 from costs.constants import SKIN_RETROFIT, SKIN_RETROFIT_AND_SYSTEM_RETROFIT_AND_PV, SYSTEM_RETROFIT_AND_PV
-from costs.co2_emission import Co2Emission
+
 
 
 class Initialize:
@@ -82,10 +82,6 @@ class UnitTests(unittest.TestCase):
       result = Cost(building, retrofit_scenario=SKIN_RETROFIT_AND_SYSTEM_RETROFIT_AND_PV).life_cycle
       self.assertIsNotNone(result)
 
-  def test_co2_emission(self):
-    for building in self.init.city.buildings:
-      result = Co2Emission(building).operational_co2
-      self.assertIsNotNone(result)
 
   def tearDown(self):
     files = glob.glob('output/[!.]*')