Energy Consumption Page 209

Q: What are some ways electricity can be used?

A: Transportation, Heat, Recreation

Q: What are some uses for hydrogen fuel cells?

A: Transportation, Heat, As a Battery

Q: What are some pros and cons to storing energy as hydrogen? In batteries? In flywheels?

A:
Pros for hydrogen-

• High energy density
• Can be produced from any electrical source
• Water is very easily available
• Don't store a fixed amount of energy

Cons for hydrogen-

• Must be handled carefully
• Very inefficient 
• Will create environmental problems

Pros for batteries-

• Store a fixed amount
• Can range in size
• Stable
• Can hold charge for an extended period

Cons for batteries-

• Expensive to build
• Expensive to maintain
• Contain dangerous chemicals
• Will create environmental problems