Question

Match each energy type with its geologic origins:
1. Natural Gas
2. Oil
3. Coal

A. Formed from organic remains of algae that thrived in the oceans during two warm periods 90 million and 150 million years ago.

B. Also from buried remains of ancient organisms, but unlike "A" above, comes from plants and animals that decomposed at higher temperatures deeper underground.

C. Warm, wet climates 360 million to 300 million years ago gave rise to an explosive growth of swamp plants that were eventually buried, subjected to high temperatures and transformed into this energy source.

Answer

1. B
2. A
3. C