&gt; Supply and demand influence value. Thus whether I charge a billion dollars or zero dollars for the oxygen you breath, you&#x27;ll still want it as much as you did before regardless of the value.<p>The demand for air is much, much smaller than the supply, so by your logic it should have very little value. Yet it has a huge value and no cost. Now you see why I&#x27;m saying that market forces influence only the cost and not the value?