- Energy formed by magma heating earth's crust is emitted along fault lines
- Geothermal energy is formed by magma heating earth 's crust
- So, geothermal energy is emitted along fault lines

- Geothermal energy is emitted along fault lines
- A source of something emits / produces / generates / provides that something
- Therefore, fault lines are a source of geothermal energy

- Nevada contains many active fault lines
- If something contains many of something else then that something else is common in that something
- Hence, active fault lines are common in nevada

- Fault lines are a source of geothermal energy
- Active fault lines are common in nevada
- Therefore, geothermal energy is common in nevada

- Geothermal energy is common in nevada
- Geothermal energy is a renewable resource
- Hence, geothermal energy is a common renewable resource in nevada

Hence, geothermal energy is a common renewable resource in nevada
Which energy type is common enough in Nevada to make a significant contribution to the renewable energy needs of the state?
- Geothermal energy is a renewable resource 
- Nevada contains many active fault lines 
- Energy formed by magma heating earth's crust is emitted along fault lines 
- Geothermal energy is formed by magma heating earth 's crust 
- A source of something emits / produces / generates / provides that something 
- If something contains many of something else then that something else is common in that something