Invasive Species

Can harmful foreign plants and animals be stopped?


Thousands of non-native species have become established in the United States, often causing devastating environmental and economic problems. Although many imported plants and animals provide the nation with food and other products, foreign organisms from pepperweed and cheatgrass to zebra mussels and Asian tiger mosquitoes clog waterways, fuel wildfires, devastate rangelands and even threaten human health. The annual cost has been estimated at up to $138 billion. Controlling the invaders ...

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