要是塑料和橡胶被焚，就会放出有毒的气体。
If plastic and rubber are burnt, they'll give off poisonous gases.
现代火山释放出的气体混合物类似于这种早期的大气，这表明它（地球）起源于火山喷发。
Gas mixtures emitted from present-day volcanoes resemble this early atmosphere, suggesting its origin from volcanic eruptions.
不会释放出温室气体。
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