Prairie islands are popping up in a sea of corn and soybeans

The Midwest has a reputation for vast fields of corn and soybeans that stretch to the horizon. But on some farms, strips of wildflowers and little bluestem now interrupt the crops, tiny glimpses of the prairie that once dominated the region. They’re an effort to hold back the fertilizer runoff that pollutes drinking water and then travels hundreds of miles downstream, where it fuels the Gulf of Mexico’s infamous Dead Zone.