下面小编跟大家一起了解大学英语四级新闻听力备考分享，希望对大家的学习有所帮助。
一、听力练习
1.
A. Researchers find way to turn carbon dioxide into valuable fuel.
B. Researchers warn the public of the possible problems brought by higher temperatures.
C. Researchers find substance which can be used to absorb carbon dioxide.
D. Researchers has successfully developed liquid fuel with zero carbon emission.
2.
A. Loss of sea ice.
B. Rising sea levels.
C. Loss of ocean life.
D. Energy crisis.
二、听力文本
Scientists blame greenhouse gases for being a major cause of climate change around the world. Higher temperatures have caused major environmental problems on Earth, scientific research shows. These problems include loss of sea ice, rising sea levels, loss of ocean life and more intense weather events. Now, a team of researchers has announced a successful experiment that turned carbon dioxide into useful liquid fuel. The researchers created a device, called a reactor, that converts carbon dioxide into a pure form of formic acid. Formic acid is a substance found in ants and some other insects, as well as in many plants. It is used as an antibacterial material and in the processing of some kinds of clothing. The results of the experiment were important because formic acid is a major carrier of energy. So, the substance can provide a way to reuse carbon dioxide and prevent it from being released into the atmosphere. Other methods for turning carbon dioxide into formic acid require intense purification processes. Such methods are very costly and require a lot of energy. The team said it was able to reduce the number of steps used in the traditional process to create a low-cost, energy-saving method. The researchers reported the reactor device performed with a conversion rate of 42 percent. This means that nearly half of the electrical energy can be stored in formic acid as liquid fuel. The team said the reactor "was able to create formic acid continuously for 100 hours with little degradation" of the device's parts. The team plans to keep working to improve the process. The team also aims to reduce the cost in hopes of bringing the technology to places around the world to help fight climate change.
Question 1: What’s the main idea of this news report?

Question 2: According to the news report, which of the following is not mentioned as one of these problems brought by higher temperatures?
三、重点词汇
1. intense: extreme and forceful or (of a feeling) very strong 强烈的，极度的
2. formic acid: 甲酸，蚁酸
3. antibacterial: intended to kill or reduce the harmful effects of bacteria especially when used on the skin （尤指用于皮肤）抗菌的，杀菌的
4. purification: the act of removing harmful substances from something 净化，提纯
5. degradation: the process in which the beauty or quality of something is destroyed or spoiled 玷污；损害，危害