如今，科学家试验了一种新的方法，通过测量人类肉眼观测不到的植被释放物质，监测其健康状况。

Now scientists have tested a new method for monitoring the health of vegetation by measuring emissions that the human eye cannot detect.

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还有努比亚长颈鹿，有些科学家认为它们可能是与动物原祖关系最近的物种，植被稀疏而酷热的大草原就是它们原始的栖息之所。

There are Nubian giraffe that some scientists think may be the closest to the animal’s original ancestor; the sparse savannah and thick heat are its original habitat.

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科学家根据标准化植被指数对植被进行了观测（未显示在上图）。

Scientists also rely on the Normalized Difference Vegetation Index (not shown) to observe vegetation.

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