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高二教案 第816期(2) 发布时间:2020-12-21 点这里下载本页内容 (447.0 KB) 2020-2021学年度第17期总第816期 Lead-in What’s your impression of plastics? Microplastics have been found on Mount Qomolangma as high as 8,440 meters above sea level, just 408.86 meters below the peak of the mountain. Microplastics refers to plastic fragments (碎片) and particles (微粒) less than 5 millimeters in diameter (直径). While-reading 1. What was the procedure of the study and what are the findings? Reading for details Scientists collected snow and water samples (样本) from 19 different locations from 4,200 meters above sea level all the way up to the summit (顶峰) of Mount Qomolangma. They found microplastics in all the water samples and part of the snow samples. The most polluted sample was from the Base Camp in Nepal, where most human activity on the mountain is concentrated. It had 79 particles of microplastics per liter (升) of snow. 2. What is the cause of the pollution? It is climbers who bring plastic products to the mountain. Even if they don’t litter, just walking for 20 minutes or opening a bottle of water can release microplastics into the environment. 3. What are other examples of plastic pollution reaching remote places on Earth? Researchers even found a plastic bag at the deepest point in the world’s oceans – in the Mariana Trench, located in the Pacific Ocean. The bag is the same as the ones commonly used in grocery stores. A 2020 report published in Nature suggests that there are 2,000 to 17,000 plastic particles per cubic meter (立方米) in Arctic ice cores, and between 0 to 18 microplastic particles per cubic meter from the water beneath ice floes (浮冰). 4. What can we do? We need to start focusing on deeper technological solutions that focus on microplastics, like changing fabric (织物) design and incorporating (加入) natural fibers instead of plastic when possible. Post-reading We are actually taking in plastics every day, the biggest source being drinking water.
What can we do to tackle this problem? Language study Homework |
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