Crossword clues for the word: BIOGAS The word BIOGAS has appeared as an answer to at least 8 crossword clues on different crossword puzzles. Crossword clues for BIOGAS Showing 1 to 8 of 8 results Clue(s) Fuel derived from fermenting organic waste Fuel from decaying organic matter Manure byproduct Renewable fuel Renewable fuel derived from organic matter Renewable fuel made from organic matter Renewable fuel on some farms Result of some fermentation