ScienceTechyNews: Cities are key to saving monarch butterflies

Monarch butterflies are at risk of disappearing from most of the US, and to save them, we need to plant milkweed for them to lay their eggs on. In two new studies, scientists found that one of the most important places for us to plant milkweed is in cities -- even though cities make up just 3% of US landmass, they have the potential to support 30% of the milkweed Monarchs need.

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