必修第二册 Unit 6 Earth first（word练习）-【勤径学升】2025年高考英语一轮总复习课时检测训练（外研版）

课时检测训练12　必修第二册　Unit 6　Earth first 对应学生用书P309 Ⅰ.阅读理解 A (2023·湖北六校期中)Soot (煤烟灰) pollution is speeding up climate-driven melting in Antarctica, a new study suggests, raising questions about how to protect the delicate continent from the increasing number of humans who want to visit. “It really makes us question whether our presence is really needed，” says Alia Khan, one of the authors of the new study. “We have quite a large black carbon footprint in Antarctica, which is enhancing snow and ice melting.” Black carbon is the leftover thing from burning plants or fossil fuels. Soot in Antarctica comes primarily from waste gases of cruise ships (游轮)，vehicles，airplanes and electrical generators, although some pollution travels on the wind from other parts of the globe. The dark particles (微粒) coat white snow and absorb heat from the sun, the way a black T-shirt does on a warm day. The blanket of dark bits speeds up melting that is already happening more quickly because of global warming. When snow and ice are uncovered, they reflect an enormous amount of sunlight before it can turn into heat. “These are the mirrors on our planet，” says Sonia Nagorski, a scientist at the University of Alaska Southeast.“When those mirrors are covered in a film of dark bits, they are less reflective. That means more heat is trapped on Earth, speeding up melting and contributing to global warming.” As a scientist who personally visits Antarctica every year, Khan says she is troubled by her own research results. On the one hand, she goes to Antarctica to collect crucial data about how quickly the snow and ice there are disappearing.“But then when we come to the conclusion like this it really does make us think twice about how frequently we need to visit the continent，”she says，“and what kind of regulation should be placed on tourism as well.” That could mean requiring that cruise ships and vehicles be electric, for example, or limiting the number of visitors each year. ［语篇导读］ 　 本文为一篇说明文。