diff --git a/scripts/build_industry_sector_ratios.py b/scripts/build_industry_sector_ratios.py
index 49c82138..a6ef9066 100644
--- a/scripts/build_industry_sector_ratios.py
+++ b/scripts/build_industry_sector_ratios.py
@@ -1006,7 +1006,7 @@ def non_ferrous_metals():
     # Alumina
 
     # High enthalpy heat is converted to methane.
-    # Process heat at T>500ºC is required here.
+    # Process heat at T>500C is required here.
     # Refining is electrified.
     # There are no process emissions associated to Alumina manufacturing.