Stunning wildlife photography highlights this set of assorted notecards presented by the Sierra Club, America's largest grassroots environmental organization.  Each set of 20 blank cards features 4 different designs (5 cards of each) and 20 envelopes.  The back of the card includes natural history information on the animal shown.  Printed on recycled paper with soy-based ink; a portion of the proceeds for each set sold returns to the Sierra Club.  Notecards measure 4¾" x 6¾".