To be fair any bigger conflict than a guerilla proxy war will do that too, whether it be from salting the fields, WWI mustard gas, unexploded ordance and/or min

To be fair any bigger conflict than a guerilla proxy war will do that too, whether it be from salting the fields, WWI mustard gas, unexploded ordance and/or mines, agent orange, or fallout from an actual nuclear bombardment. The scars of war persist for quite a while.