Reading: 文章观点说释放硫到空中对抗温室效应是不好的。 第一：确实会产生酸雨，但形成酸雨的过程只会发生在lowest atmosphere level，放在高一点的就可以了。 第二，释放硫相比别的方法就显得不贵了。然后举了fuel emission control的对比。 第三，即使释放硫的效果很小，但是small changes have far reaching effect。讲到了气温降低0.5度冰山少融化然后防止了洪水。 Listening: 1、把火箭打高一些，就没酸雨了； 2、比创新减排要便宜； 3、温度不降但影响强烈，冰川它不化了～
The lecture denies the view mentioned in the reading, aiming to further claim the possibility to use sulfur to tackle green-house effect. Firstly, from the perspective of acid rain, the professor states his doubt, because according to the lecture, it indicates that acid rain only forms in the lowest atmosphere level, and when the rocket taking the sulfur enters the higher atmosphere level, acid rain never happens. Secondly, judging from the cost of sulfur, the professor holds a different view, because even if the reading argues the high cost of sulfur method, however, when compared with other fuel emission control methods, the lecture believes the former is cheaper than the latter innovative methods. Thirdly, on the point of its effect, the professor never fails to express his concern, because referring to the lecture, it emphasizes that even if the instant effect of the sulfur method is little, but it has far-reaching effect, as a 0.5 Celsius decrease in temperature will stop the glaciers melting. (164 words)
