For a long time, veteran environmental journalist Fred Pearce thought in stark terms about invasive species: they were the evil interlopers spoiling pristine "natural" ecosystems. Most conservationists and environmentalists share this view. But what if the traditional view of ecology is wrong - what if true environmentalists should be applauding most of the invaders? Here Pearce goes on a journey across six continents to rediscover what conservation...

Earth Then and Now records the dramatic way our planet has changed over the past century. On one page is a specific part of the world as it was 10, 50 or even 100 years ago. On the facing page is the same place as it looks today. Each stark visual comparison tells a compelling story -- a melting glacier, an expanding desert, an encroaching cityscape, a natural disaster.Additions to the second edition include these important scenes: * Before and...