Here's some insight and (hopefully) some incite from Sigurd Olson 57 years ago.
"Let us therefore not be content until our rivers again run clean, until denuded hills are covered with green trees and the dustbowls with grass and all topsoil is safe from erosion. Let us pledge ourselves anew to the restoration of drained marshland so that some day they too may be full to the brim and alive with songbirds and waterfowl. Let us in the same spirit not only keep our country clean and beautiful but restore the places we have made ugly. Let us keep our wilderness areas as sanctuaries of the spirit. Thanksgiving is an empty gesture unless we realize we too must give." — Sigurd Olson, "Thanksgiving: More than a holiday," Originally published in the November 1958 issue of Outdoor America, Posted online by the Izaak Walton League of America (iwla.org), 11/20/2015. Checkout the whole article at https://www.facebook.com/iwla.org/posts/10153123330301360