60秒科学:Wind's Power Potential Quantified
Last month, President Obama pledged nearly half a billion dollars toward the development of solar and geothermal energies. But what about wind? A team of scientists estimates that wind turbines in the continental 1 U.S. could produce 16 times more electricity than we currently use. They present their data in the current Proceedings 2 of the National Academy of Sciences.
We all know that wind can be harnessed to do work. But this power source can be a bit fickle 3: today it might gust 4, while tomorrow could bring barely a breeze. So how much can we count on the movement of air to meet all our energy needs? The scientists used data from satellites, balloons, and aircrafts, to estimate wind speeds around the planet. They excluded cities, forests, and ice-covered areas, which would all be hard to harvest.
Crunching 5 the numbers, they concluded that a global network of land-based turbines could make 40 times more electricity than the world currently consumes—even if they only operated at 20 percent of their capacity.
People may balk 6 at the sight of a sea of wind turbines. And flying wildlife may be bollixed by the blades. But wind power’s benefits may blow away its problems.
—Karen Hopkin
- A continental climate is different from an insular one.大陆性气候不同于岛屿气候。
- The most ancient parts of the continental crust are 4000 million years old.大陆地壳最古老的部分有40亿年历史。
- 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
- Fluctuating prices usually base on a fickle public's demand.物价的波动往往是由于群众需求的不稳定而引起的。
- The weather is so fickle in summer.夏日的天气如此多变。
- A gust of wind blew the front door shut.一阵大风吹来，把前门关上了。
- A gust of happiness swept through her.一股幸福的暖流流遍她的全身。
- The horses were crunching their straw at their manger. 这些马在嘎吱嘎吱地吃槽里的草。 来自《简明英汉词典》
- The dog was crunching a bone. 狗正嘎吱嘎吱地嚼骨头。 来自《简明英汉词典》