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Science Bowl Question

📅 NSB 2012🎓 HS🔄 Round 9#️⃣ Q18❓ TOSS-UP📝 Multiple Choice

Which of the following conditions is NOT required to form coal?

W) A stagnant and stable water level
X) Heat and pressure over a long period of time
Y) An equal supply of both vegetation and sediment
Z) A plant accumulation rate equaling land subsidence rate
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