第六十七篇: 碳排放和绿色环保 | 考研英语阅读必备

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The planet is getting lusher.

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Carbon dioxide generated by human activity is stimulating photosynthesis and causing a beneficial greening of the Earth's surface.

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Researchers claim to have shown that the increase in plant cover is due to this "CO2 fertilisation effect" rather than other causes.

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However, factors such as higher temperatures, extra rainfall, and an increase in atmospherics CO2 -- which helps plants use water more efficiently -- could all be boosting vegetation, so pinning down the cause has been difficult.

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第六十七篇: 碳排放和绿色环保
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