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