fossil fuel
d. unnatural gas
3. What do you call a fuel such as ecal, petroleum, and natural gas that formed in the Earth
from decayed organisms?
a. fossil fuel
c. sedimentary rock
b. natural gas
d. unnatural gas
4. Why should we conserve fossil fuels?
a. They are renewable.
c. We can make more of them.
b. We can run out of them. d. They can only be found ina​