Here are a few facts about Mars 1. You can make steel 2. You can make rocket fuel 3. You don't need a high delta-v to get into space When you combine these

Here are a few facts about Mars 1. You can make steel 2. You can make rocket fuel 3. You don't need a high delta-v to get into space When you combine these facts together, it appears that you can make effective steel rockets. On the Moon, facts 1 and 2 are not true, even if fact 3 is.