人口增长得非常快，他们需要更多的房子。
The number of people increasing quickly, they need more houses.
富人的生活趋向于放出更多的温室气体，因为他们会更多驾驶燃油汽车，更频繁的坐飞机旅行，生活在大房子了，从而需要更多的燃料来取暖或者制冷。
Rich people's lives tend to give off more greenhouse gases because they drive more fossil-fueled vehicles, travel frequently by air and live in big houses that take more fuel to heat and cool.
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