從冰山獲取淡水考研英語(yǔ)作文
在學(xué)習(xí)、工作或生活中，大家總免不了要接觸或使用作文吧，寫作文是培養(yǎng)人們的觀察力、聯(lián)想力、想象力、思考力和記憶力的.重要手段。相信許多人會(huì)覺(jué)得作文很難寫吧，以下是小編收集整理的從冰山獲取淡水考研英語(yǔ)作文，供大家參考借鑒，希望可以幫助到有需要的朋友。
the concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. but now it is being considered quite seriously by many nations, especially since scientists have warned that the human race will outgrow its fresh water supply faster than it runs out of food.
glaciers are a possible source of fresh water that has been overlooked until recently. three-quarters of the earths fresh water supply is still tied up in glacial ice, a reservoir of untapped fresh water so immense that it could sustain all the rivers of the world for 1,000 years. floating on the oceans every year are 7,659 trillion metric tons of ice encased in 10000 icebergs that break away from the polar ice caps, more than ninety percent of them from antarctica.
huge glaciers that stretch over the shallow continental shelf give birth to icebergs throughout the year. icebergs are not like sea ice, which is formed when the sea itself freezes, rather, they are formed entirely on land, breaking off when glaciers spread over the sea. as they drift away from the polar region, icebergs sometimes move mysteriously in a direction opposite to the wind, pulled by subsurface currents. because they melt more slowly than smaller pieces of ice, icebergs have been known to drift as far north as 35 degrees south of the equator in the atlantic ocean. to corral them and steer them to parts of the world where they are needed would not be too difficult.
the difficulty arises in other technical matters, such as the prevention of rapid melting in warmer climates and the funneling of fresh water to shore in great volume. but even if the icebergs lost half of their volume in towing, the water they could provide would be far cheaper than that produced by desalinization, or removing salt from water.
【從冰山獲取淡水考研英語(yǔ)作文】相關(guān)文章：
考研資料獲取的渠道01-23
考研資料的獲取以及考試技巧01-23
獲取考研調(diào)劑信息有哪些渠道03-28
如何利用2017年考研大綱獲取高分11-12
如何從四六級(jí)作文過(guò)渡為考研英語(yǔ)作文08-24
2018年考研如何獲取第一手考研資訊12-07