Offering a thought-provoking and intelligent look at the earth's ecosystems and the changes that affect us all, Environmental Change and Challenge covers both environmental science and environmental management from a uniquely Canadian focus. Sections explain how marine and terrestrial ecosystems work, how predator-prey relationships form part of the intricate web linking all species, how the survival or extinction of one species affects the survival or extinction of other species in the food chain, and how we must now learn to manage the resources we depend on in much more effective ways, and how we can take a proactive approach to minimize our personal impact on the environment.