Clue: Certain global warming culprit

Answer: COAL

Length: 4

---

Similar Clues:

• Global warming guru (GORE with 4 letters)
• Periods in stark contrast to global warming (ICEAGES with 7 letters)
• "WTF global warming??" (BRRR with 4 letters)
• Piece in the global warming debate? (FLOE with 4 letters)
• It's affected by global warming (SEALEVEL with 8 letters)
• Global-warming issues (GREENHOUSEGASES with 15 letters)
• Periods in contrast to global warming (ICEAGES with 7 letters)
• Cause of global warming (GREENHOUSEGASES with 15 letters)
• Global warming? (DETENTE with 7 letters)
• Oklahoma senator who doubts global warming (INHOFE with 6 letters)