Pollution
When we cut down the last tree !
When we fish the last fish !
When we pollute the last river !
(then) we will understand that we can not / cannot eat money.
But, unfortunately, this warning will then have no meaning!
<em>Very interesting idea! Thanks. You "cut down" or "fell" a tree to get the timber / wood. "Cut" on its own does not quite express this. Well done. Michael</em>