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SSS 2008-02-13

时间:2010-05-13 02:32来源:互联网 提供网友:0922013129   字体: [ ]
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    (单词翻译:双击或拖选)

This is Scientific American's 60-Second Science. I am Karen Hopkin. This'll just take a minute.

Seems like every other week brings news that global warming is gonna  be bad for some poor animal or other. But plants? Well, I guess I was thinking that plants would welcome the heat. I mean, global warming is caused by greenhouse gases. And plants live in greenhouses. So everyone’s happy. Well, according to a new study, published in the February 12 issue of the Proceedings1 of the National Academy of Sciences, I was wrong. Or at least not quite right. Because plants, too, are likely to face problems as the earth heats up. And their biggest problem may be: insects.

Scientists were looking at the fossilized remains2 of leaves that fell off trees about 55 million years ago. At that time, the planet was undergoing a period of warming. The scientists found that as the temperatures rose, the leaves looked more…nibbled. Seems that with more CO2 in the atmosphere, plants take up more carbon. That actually makes their leaves less nutritious3 for plant-munching bugs4—so the insects just eat more. So, a warmer planet will be home to some hungry bugs. Which I dare say will not please the trees. Or anyone else who relies on plants for food—which includes, ultimately, all of us.

 Thanks for the minute, for Scientific American's 60-Second Science. I am Karen Hopkin.
 


点击收听单词发音收听单词发音  

1 proceedings Wk2zvX     
n.进程,过程,议程;诉讼(程序);公报
参考例句:
  • He was released on bail pending committal proceedings. 他交保获释正在候审。
  • to initiate legal proceedings against sb 对某人提起诉讼
2 remains 1kMzTy     
n.剩余物,残留物;遗体,遗迹
参考例句:
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。
3 nutritious xHzxO     
adj.有营养的,营养价值高的
参考例句:
  • Fresh vegetables are very nutritious.新鲜蔬菜富于营养。
  • Hummingbirds have discovered that nectar and pollen are very nutritious.蜂鸟发现花蜜和花粉是很有营养的。
4 bugs e3255bae220613022d67e26d2e4fa689     
adj.疯狂的,发疯的n.窃听器( bug的名词复数 );病菌;虫子;[计算机](制作软件程序所产生的意料不到的)错误
参考例句:
  • All programs have bugs and need endless refinement. 所有的程序都有漏洞,都需要不断改进。 来自《简明英汉词典》
  • The sacks of rice were swarming with bugs. 一袋袋的米里长满了虫子。 来自《简明英汉词典》
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