| Answer | Crossword Clue |
|---|---|
| biofuels | A fuel derived directly from living matter |
| abiogenist | a believer in abiogenesis, the supposed spontaneous origination of living organisms directly from lifeless matter |
| abiogenists | ABIOGENIST, a believer in abiogenesis, the supposed spontaneous origination of living organisms directly from lifeless matter |
| BIOGAS | Renewable fuel derived from organic matter |
| biogases | any gas fuel derived from the decay of organic matter, as the mixture of methane and carbon dioxide produced by the bacterial decomposition of sewage, manure, garbage, or plant crops |
| biogas | any gas fuel derived from the decay of organic matter, as the mixture of methane and carbon dioxide produced by the bacterial decomposition of sewage, manure, garbage, or plant crops |
