PDN 4-22

an energy-rich substance such as petroleum, coal, or natural gas formed from the remains of organisms​ (a)  

• fossil fuel
• coal
• natural gas
• renewable resources
• non-renewable resources

a dark-brown to black solid substance formed naturally from the compaction and hardening of fossilized plants and used as a fuel primarily for electricity generation​ (a)  

• coal
• natural gas
• renewable resources
• non-renewable resources
• fossil fuel

• a mixture of hydrocarbon gases that occurs naturally beneath the earth's surface and is used as a fuel primarily for cooking and heating homes​ ​ ​ (a)  

• natural gas
• renewable resources
• non-renewable resources
• fossil fuel
• coal

• a resource that is never used up (e.g., solar energy)​ ​ ​ ​ ​ (a)   ​ ​

• non-renewable resources
• fossil fuel
• coal
• natural gas
• renewable resource

• a resource that is not replaceable after its use (e.g., coal, gas)​ ​ ​ ​ ​ ​ (a)  

• non-renewable resources
• fossil fuel
• coal
• natural gas
• renewable resources

Give an example of one renewable resources and one non-renewable resource (other than coal).