Endangered Energy: Investigating the Scarcity of Fossil Fuels

Endangered Energy: Investigating the Scarcity of Fossil Fuels — page 3
CHAPTER 2 Meet the Fossil Fuels Heat and pressure inside of the Earth Coal natural gas and oil were formed deep inside Earth helped transform millions of years ago They are called fossil fuels because they decaying plants and were formed from the remains of plants and animals that lived animals into fossil fuels long ago Forming Fossil Fuels About 300 million years ago Earth was mostly covered with swamps When plants and animals died their remains sank to the bottom of the swamps Over time mud sand and rock piled on top of the remains After millions of years heat and pressure inside Earth caused the remains to change into oil natural gas coal or