托福听力课外资料练习：科学美国人60秒麻醉师减缓气候变化相关内容分享

2017年07月24日13:45 来源：小站整理: 参与（0）阅读（2513）

摘要：托福听力的备考十分的重要，那么你应该如何练习呢?在备考过程中除了一些真题之外，一些常用的课外资料也是十分重要的。小编经常用到的就是科学美国人60秒，下面编在这里为为大家整理了科学美国人60秒：麻醉师减缓气候变化相关的内容分享，希望对大家有帮助。

在托福听力考试的备考过程中，科学美国人60秒相信大家一定用得比较多，那么大家平时是如何利用这个课外资料的呢?这里小编整理了科学美国人60秒：麻醉师减缓气候变化相关的内容分享，大家一起来学习一下吧。

科学美国人60秒听力练习：麻醉师减缓气候变化

科学美国人60秒英文文本

Gases used in surgical anesthesia contribute the greenhouse gas equivalent of a million cars. But better anesthesia choices can lessen the impact. Cynthia Graber reports

每年用于外科手术麻醉的气体相当于100万辆汽车所产生的温室气体。但是选择更好的麻醉剂能够减少对环境的影响。

When they wheel you into the operating room, climate change is probably the last thing on your mind. But maybe it should be on your anesthesiologist’s mind. Because the gases used to knock you out contribute to global warming.

Researchers, including one from the Jet Propulsion Laboratory at CalTech, a chemist from the University of Copenhagen and an anesthesiologist from the University of Michigan Medical School, studied three anesthetic gases: isoflurane, desflurane and sevoflurane.

The compounds are in a class of gases related to a refrigerant that’s about to be banned in Europe. In the worst case each pound of desflurane that enters the atmosphere is the equivalent of 1,620 pounds of carbon dioxide. The researchers say that on average the amount of anesthesia used worldwide for surgery annually has the warming equivalent of one million cars. The study is in the British Journal of Anaesthesia. [M. P. Sulbaek Andersen et al., "Inhalation Anaesethics and Climate Change"]

The other two gases have significantly less impact: isoflurane is only a third as powerful a greenhouse gas as is desflurane and sevoflurance has only an eighth of desflurane’s effect. So, say the researchers, if a choice can be safely made, anesthesiologists should go with the one that’s kindest to the climate.