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Rising season severe storm is the most talked about threats of climate change. But here is another. No more coffee. Because rising temperatures make cripple wild populations of Arabica coffee, and most cultivated species in the world. So says a study in the journal PLoS ONE.

Researchers use climate models to forecast the effects of warming on Arabica coffee trees in Ethiopean,their native range. Under the best case scenario¹, meaning fewer emissions² and less warming. Only a third of today's range would still be suitable for coffee by 2080.In the worst case, wild Arabica could be nearly wiped out in the region. That's because coffee trees are sensitive to temperature. The researchers say, they may not be able to colonize³ new areas fest enough to beat climate change. That's assuming no direct human impact, like clearing land for grazing, which is already a problem though. Of course the coffee in your cup doesn't come from wild trees. But wild coffee forest have a much bigger gene⁴ pool than cultivated crops, meaning more * diease, path and drown. Preserving that diversity might just be grounds to act on climate change.

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1 scenario
n.剧本，脚本；概要
参考例句：
But the birth scenario is not completely accurate.然而分娩脚本并非完全准确的。 This is a totally different scenario.这是完全不同的剧本。

2 emissions
排放物( emission的名词复数 )；散发物（尤指气体）
参考例句：
Most scientists accept that climate change is linked to carbon emissions. 大多数科学家都相信气候变化与排放的含碳气体有关。 Dangerous emissions radiate from plutonium. 危险的辐射物从钚放散出来。

3 colonize
v.建立殖民地，拓殖；定居，居于
参考例句：
Around 700 Arabs began to colonize East Africa.公元700年阿拉伯人开始把东非变为殖民地。 Japan used to colonize many countries in Asia.日本曾经殖民过许多亚洲国家。

4 gene
n.遗传因子，基因
参考例句：
A single gene may have many effects.单一基因可能具有很多种效应。 The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。