Invasive Species Are Wreaking Havoc

Globalization and climate change are bringing invasive species to the U.S., disrupting ecosystems and wreaking economic havoc. There are more than 50,000 alien species in this country, and they’ve often been able to outcompete—or eat—native flora and fauna. Time magazine senior writer Bryan Walsh explains why the problem seems to be getting worse. His article “Invasive Species: From Giant Snails to Asian Carp, Alien Wildlife is on the Move” in the July 28 issue of Time.