diff --git a/CO2 b/CO2
new file mode 100644
index 0000000000000000000000000000000000000000..267a98486e5780fef95691db932b004e58380a6c
--- /dev/null
+++ b/CO2
@@ -0,0 +1,15 @@
+from enum import Enum
+import math
+from decimal import Decimal
+
+class AirCraft(Enum):
+    L = 1
+    M = 2.5
+    H = 5
+    J = 12
+
+
+def emission(distance: Decimal, aircraft: AirCraft) -> Decimal:
+    resultat= class Aircraft*(distance/800)*3.15*2
+    return resultat
+print(emission)
\ No newline at end of file