Two cub Dad -
I would've bet you were right - only I thought it was above the LEFT pocket, in place of the world scouting emblem - so I looked it up, and we're both wrong!
Well, maybe - it doesn't say that the conservation patch is a "temporary insignia", if it is, it goes on the Right pocket - and it would be covered up by the Arrow points / compass patch attached to your shirt pocket button.
the conservation patch is an INTERNATIONAL award - and I can't find anything, cub scout or boy scout, that says exactly where it, specifically, should go, or that the boy scout can't wea