We need more milkweed

Milkweed is the food for monarch butterflies. But there is less milkweed available because of the extensive use of herbicides to kill it. One scientist estimates that we have lost 24,000,000 acres of milkweed in the past decade. Monarchs migrate to Mexico in the winter. In the winter of 1996-97 they covered 44.9 acres of forest. This winter they covered only 1.7 acres.