How does the world obtain and use energy?

Developing Understanding: This unit examines human use of renewable and nonrenewable sources of energy and its impact on the environment. Energy consumption differs throughout the world and the availability of natural energy resources depends on the region's geologic history. Subsequent units will examine the impact of human activity on the atmosphere, land and water.

Enduring Understanding: Humans use energy from a variety of sources, resulting in positive and negative consequences.