diff --git a/doc/supply_demand.rst b/doc/supply_demand.rst
index c0cf2f4e..ec5c8201 100644
--- a/doc/supply_demand.rst
+++ b/doc/supply_demand.rst
@@ -357,10 +357,19 @@ Inside each country the industrial demand is then distributed using the `Hotmaps
 
 
 *Iron and Steel*
-$$CO_2 + C→ 2 CO$$ 
-$$ 3 Fe_2O_3 + CO → 2 Fe_3O_4 + CO$$ 
-$$Fe_3O_4 + CO −−−→ 3 FeO + CO_2$$
-$$FeO + CO −−−→ Fe + CO_2$$
+
+$$ 
+CO_2 + C→ 2 CO
+$$ 
+$$ 
+3 Fe_2O_3 + CO → 2 Fe_3O_4 + CO
+$$ 
+$$
+Fe_3O_4 + CO −−−→ 3 FeO + CO_2
+$$
+$$
+FeO + CO −−−→ Fe + CO_2
+$$
 
 *Chemicals Industry*