In recent years, scientists have found that the monarch butterfly population has declined significantly from what it was even ten years ago. Although there are many possible causes, the scientists have marked the decline of milkweed along the edges of Midwestern farmland as the most likely cause of decline in the butterfly population. With genetically modified crops, farmers are now able to spray the crops (including the milkweed) with pesticides, which kills the milkweed, but does not harm the

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