在重新进入大气层的过程中，大部分航天器会在穿过地球大气层时燃烧殆尽。
During re-entry, most of the spacecraft will burn up while passing through the Earth's atmosphere.
天文学家也一直持相似结论：当太阳燃烧、膨胀以至于它的表面触碰到地球之时，地球将被这个巨大火球所毁灭。
Astronomers have long come to a similar conclusion: that the Earth will be obliterated by a giant fireball as the sun burns up and expands so that its surface touches the planet.
我们的主要矿物燃料包括——煤，石油和汽油——他们的组成成分都包括碳，它已经在我们的地球积压了数百万年，我们现在将它使用和燃烧，让它快速的归还到大气中。
Our main fossil fuels — coal, petroleum and gasoline — are made up of carbon that has been compressed in the Earth for millions of years and we're now burning and rapidly restoring to the atmosphere.
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