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Show Notes
Planes need fuel to fly. Now planes use fuel that makes the air dirty. It's a fossil fuel. But did you know planes can use new, cleaner fuel? It makes less dirty air!
飛機需要燃料才能起飛，這些燃料產生很多空氣污染。但是你知道嗎? 現在飛機也可以選擇更乾淨的環保燃料!
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