The grasslands of North America are among the most endangered ecosystems on this continent. Less than 4 percent of the tallgrass prairie remains unplowed or undeveloped, most here in the Flint HIlls. Learn about the Konza Prairie, tallgrass prairie conservation and management through fire and grazing, and more during a presentation by Konza Prairie staff. @ Dorothy Bramlage Public Library 230 W. 7 th Street, Junction City.