Alien Invasion: Invasive Species Become Major Menaces (Current Science) - Tapa dura

Aliens have taken over Earth! They’ve overrun our parks, our gardens, our lakes and streams. These strangers did not come from outer space, though. They are plants, animals, and other organisms that have hitchhiked beyond their own home sweet habitats on Earth. Learn about the damage invasive species do to our environment and economy. Can these alarming aliens be stopped?