kasekienerugiino
1. Fossil fuel
Noun
#216121
1. Fossil fuel
1. fossil
2. petrifaction; petrification
1. energy conservation; economical use of energy
1. energy
1. Agency of Natural Resources and Energy
1. Not a fossil.; Not fossilized.
1. Fossil.; It is a fossil.
1. with fossils; made of fossils
1. Was a fossil.