Title: Define energy efficiency.
Course: Energy Supply: Sustainability and Efficiency I (20901-I) > Section: Exploring Sustainability and Efficiency

Definition should include

- inputs and outputs (the importance of getting more output from less input)
- physical limitations of various technologies and energy sources
- the relationship between efficiency and sustainability.

Process/Skill Questions:

- How are efficiency and sustainability related?
- Why are there physical limitations to contend with? Why can’t any energy system be 100% efficient?
- Why is energy lost when energy is converted from one form to another?