Minnesotans tend to know a lot about birds and plants. But they may not know as much about water quality, geology or land issues. In 2005, Extension and the Minnesota Department of Natural Resources created the Master Naturalist program to teach people about their environment and build a corps of dedicated, enthusiastic volunteers. Master Naturalists learn the natural history of one of Minnesota's three biomes: Big Woods, Big Rivers; Prairies and Potholes; or North Woods, Great Lakes. Then they perform nature-related service, like gathering prairie seed and helping educate others. So far, Master Naturalists have contributed $191,000 in services, improved more than 57,000 acres of land and helped educate 47,000 people.