英語聽力 學(xué)英語,練聽力,上聽力課堂! 注冊 登錄
> 在線聽力 > 英語高級聽力 > 英語時差 >  第1355篇

英語時差:森林燃料的可持續(xù)發(fā)展

所屬教程:英語時差

瀏覽:

2023年01月04日

手機(jī)版
掃描二維碼方便學(xué)習(xí)和分享
https://online2.tingclass.net/lesson/shi0529/10000/10183/1383.mp3
https://image.tingclass.net/statics/js/2012

Ya?l: Time to go again to the A Moment of Science mailbag. A listener writes: Dear Don and Ya?l, I know that eventually oil will run out and that we'll need to develop alternative sources of energy. And I keep hearing about things like wind and solar power and hydrogen fuel cells. But which of these seems most likely to emerge as a major source of energy in the future? Don: Good question. Of course, wind and solar power will most likely play roles, as well as nuclear power. But there's another potential source of renewable energy that you don't hear as much about--forests. Y: Wait, you mean like chopping down trees and using wood as fuel? D: Sort of. Y: But won't that lead to deforestation? That's what happened a few hundred years ago, before coal, when wood was the main source of energy and we cut down entire forests. D: True, but that's not what I'm talking about. Some energy scientists today see forests as sources of renewable energy. For example, forest biomass, meaning leaves and stems and small trees and other plants, can be used to make ethanol. Forest biomass can also be used to produce charcoal-like pellets that can be burned for energy. Y: OK, but we're still talking about cutting down trees, right? D: Yes, but not all the trees at once. And forest scientists know that cutting out smaller trees and plants is actually good for forests. When forests become too crowded with trees competing for light and water, biodiversity tends to suffer. So careful thinning out of forests can be healthy. Y: Interesting. So maybe one day we'll be running on forest power. D: Maybe.

用戶搜索

瘋狂英語 英語語法 新概念英語 走遍美國 四級聽力 英語音標(biāo) 英語入門 發(fā)音 美語 四級 新東方 七年級 賴世雄 zero是什么意思常州市金新潤園英語學(xué)習(xí)交流群

網(wǎng)站推薦

英語翻譯英語應(yīng)急口語8000句聽歌學(xué)英語英語學(xué)習(xí)方法

  • 頻道推薦
  • |
  • 全站推薦
  • 推薦下載
  • 網(wǎng)站推薦