Bee's knees: a new $4m effort aims to stop the death spiral of honeybees

General Mills is co-funding a project with the federal government to restore the habitat of pollinators such as bees and butterflies on North American farms

On the 33-acre Prairie Drifter Farm in central Minnesota, farmers Joan and Nick Olson are cultivating more than just organic vegetables. Alongside their seven acres of crops - including tomatoes, cucumbers and onions - they've also planted flowering plants, dogwood and elderberry hedgerows to accommodate species of bees and butterflies essential for the health of the crops.

The Olsons are not beekeepers, but they are part of a movement to reconnect sustainable farming to a healthy environment. As part of a 2013 project by Xerces Society, a nonprofit that specializes in wildlife preservation, the Olsons worked with a biologist to figure out what types of flowers and shrubs to plant to attract bees, butterflies and other insects that pollinate plants. With seeds and plants they received from Xerxes, and those bought with federal grants, the couple also planted strips of grasses and flowers to attract beetles, which help to defend the vegetables against pests.