A series of documentaries offer an in-depth look at consequences of global warming. Cameras follow a scientific expedition to the Arctic for a study of the polar ice cap, to determine how quickly the ice there is melting. Naturalist Jeff Corwin looks at animal extinction and how rapidly some species are dwindling down to 100 or fewer on the planet and efforts to save them. Scientists discuss the effects of global warming on the worldwide water supply and the possible consequences of population growth. And experts examine mankind's reliance on various forms of power as well as its results for the planet.