I don't have detailed knowledge of Great lakes to give you specifics on why this is a problem However generally no water system is closed or independent of eac

I don't have detailed knowledge of Great lakes to give you specifics on why this is a problem However generally no water system is closed or independent of each other. Precipitation, weather and other cycles (wind, heat, underground etc) make even small changes in distant places drastically impact outcomes anywhere ( the OG butterfly effect). So I would still say conservation of use is independent of how abundant it seems locally and how disconnected it looks on the surface to other problems.