因为如果我们不这么做，我们就是在破坏地球，就像现在发生着的一样，污染空气。
Because if we don't do that we are destroying the earth, as it is happening now, polluting the air.
河流被污染，海洋被开发，温度在上升，树林被砍伐，现在的地球已经不能在遭到破坏了，不然人类会得到惩罚。
Rivers polluted and ocean is developed, temperature on the rise, woods will be cut down, and now the earth has been unable to destruction, otherwise the human will get punished.
现在我们的地球正在遭受污染，有大气污染，噪音污染，水污染等等的。
Pollutes our earth to suffer the pollution now, has the air pollution, the noise pollution, the water pollution and so on.
燃料电池技术曾经只被用来为航天器提供动力，但现在被拿到地球上，给人们带来了无污染交通运输的前景。
Fuel - cell technology was once used exclusively to power spacecraft, but it is now being brought down to earth, offering the prospect of pollution - free transportation.
燃料电池技术曾经只被用来为航天器提供动力，但现在被拿到地球上，给人们带来了无污染交通运输的前景。
Fuel - cell technology was once used exclusively to power spacecraft, but it is now being brought down to earth, offering the prospect of pollution - free transportation.
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