"Promoting the government to establish laws regarding the use of pesticides and herbicides, or setting up conservation areas for monarch butterflies in the wilderness, was nearly impossible. However, researchers created some models and found that increasing the food for monarch butterflies in cities could serve to protect them."
The food of monarch butterflies is tropical milkweed, a plant rich in sap. People thought that perhaps they could, with far less money, send a packet of tropical milkweed seeds to each resident of a certain area, asking them to scatter these seeds in the city's small gardens, in their own backyards, or in the wastelands. This network of tropical milkweed could change the fate of the monarch butterflies."
This process had its failures, but also many dramatic successes. People discovered that the idea was indeed viable; after sending the tropical milkweed seeds to the residents, gardens of the plant began to appear one after another across the city."