雅思听力每个部分都有最常考的场景对话。Section1, 2, 3的频场景分别为休闲活动，旅游和作业讨论场景。
今天小编为大家带来听力机经中最常涉猎到的环境场景话题，以及填空题中最常出现的难点词汇。
环境场景
Listening situation: environment (section 2/4)
这类单词肯定是大家感觉到比较专业和难于掌握的，并不是需要学员们全部记忆下来，但起码要做到对发音和中文意思比较敏感，这样才会对全文的听力内容有一个较好的把握。否则就好像是听到了科普类文章一样，茫然不知所措，进而导致完全放弃。
Atmosphere: oxygen, hydrogen, nitrogen, carbon dioxide, carbon monoxide, ozone, sulphur monoxide
Pollution: air pollution, acid rain, contaminated water, pollutant, contaminant, chemicals, toxic waste
Geographical: soil erosion, desertification, drought, floods, overfishing, over-felling, deforestation
Energy: fossil fuels, coal, gas, petroleum, solar, tide, wind power, nuclear, marsh gas, methane, biogas
Recycling: plastic, paper, glass, bottle tops, ink cartridges, spare parts/components
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