国产精品99一区二区三_免费中文日韩_国产在线精品一区二区_日本成人手机在线

Scientists propose new way to tackle climate change

Source: Xinhua| 2018-11-24 10:16:17|Editor: mym
Video PlayerClose

LOS ANGELES, Nov. 23 (Xinhua) -- Scientists have proposed a new way to tackle climate change by spraying sun-dimming chemicals into the Earth's atmosphere, according to a study published Friday.

Scientists at Harvard and Yale universities have proposed using a technique known as Stratospheric Aerosol Injection (SAI), which they believe could cut the rate of global warming by half, according to a paper published in the journal Environmental Research Letters.

The technique would involve spraying large amounts of sulfate particles into the Earth's lower stratosphere at altitudes as high as 12 miles (19.3 km).

However, no existing aircraft design -- even with extensive modifications -- can reasonably fulfill this mission, said the paper.

The scientists propose developing a new purpose-built high-altitude tanker with substantial payload capabilities to deliver the sulfates.

The estimated cost of deploying material is about 2.25 billion U.S. dollars a year over 15 years, according to the paper. Scientists calculate the number of flights at 4,000 for the first year, linearly increasing by 4,000 a year.

The report also acknowledges that the technique is purely hypothetical.

"We make no judgment about the desirability of SAI. We simply show that a hypothetical deployment program commencing 15 years hence, while both highly uncertain and ambitious, would indeed be technically possible from an engineering perspective. It would also be remarkably inexpensive," the paper said.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001376281171
主站蜘蛛池模板: 七台河市| 阿鲁科尔沁旗| 县级市| 宁河县| 新宁县| 阳西县| 黎平县| 甘泉县| 德昌县| 太湖县| 离岛区| 崇义县| 温宿县| 上犹县| 太原市| 南华县| 梅河口市| 九龙县| 晋城| 高安市| 建昌县| 夏津县| 大英县| 阜康市| 青铜峡市| 多伦县| 太原市| 巴中市| 苍山县| 黎川县| 进贤县| 如皋市| 淮南市| 涞源县| 玉树县| 潍坊市| 新丰县| 洪泽县| 松溪县| 册亨县| 库尔勒市|