Cengage Advantage Books: Sustaining the Earth 10th Edition by Tyler Miller,Scott Spoolman

تمرين 20

What is a biome? Define the three major biome types- desert, grassland, and forest -and describe conditions under which each type forms. Define mountain and explain why mountains are important to the biosphere. For each of the major biome types, give two examples of how human activities are affecting their ecosystems.