What role does flaring play in natural gas production and its climate impact?

• A. It vents unburned methane directly to the atmosphere with minimal energy loss.
• B. It captures CO2 from gas production for permanent storage.
• C. It eliminates methane releases without climate tradeoffs.
• D. It combusts associated gas to reduce venting; it emits CO2, wastes energy, and can reduce methane release but still has climate and efficiency costs.

Answer: (D)

Flaring is used to burn off associated gas that can’t be sold or easily used. The climate-relevant idea is that methane released from production is a very potent greenhouse gas, so burning it turns methane into carbon dioxide and water. This reduces the amount of methane reaching the atmosphere, which lowers short-term climate impact. But it isn’t perfect: CO2, while less potent than methane per unit, still warms the planet, and the process wastes energy that could be captured or utilized. Incomplete combustion can let some methane escape anyway. So flaring lowers methane emissions but creates CO2 and energy losses, making it a tradeoff rather than a complete solution.