ORRVILLE, Ohio, July 30, 2015 /PRNewswire/ -- Smucker's® Natural Peanut Butter is once again supporting National Parks Conservation Association (NPCA) to make a natural difference. In the brand's fourth consecutive year of sponsorship, Smucker's Natural Peanut Butter will donate $100,000 to NPCA.  The donation will support projects like America's Great Waters, a program that protects the health of the waters in and around national parks.