Where have the bees gone?
"How important are honeybees? Crops in the United States that rely on these pollinators include 300 different nectar-producing plants and trees, including all vine crops, such as cucumbers, squash, melons and pumpkins, and also all fruits. Honeybees pollinate the alfalfa that feeds the cattle that make the milk our children drink. They're responsible for one-third of human nutrition."