2020_2021学年新教材高中英语UNIT3CONSERVATION课件北师大版选择性必修第一册202103152106

1、UNIT 3CONSERVATION 美 文 导 入 素养解读：普通高中英语课程标准要求对学生进行文 化素质的培养。文化素质的培养主要是指通过英语教学使学生 扩大视野，认识地球和我们所生活的环境，弄清地球的自然资 源，把握能源革命的最新发展。通过对本单元课文的学习，同 学们要学会在日常生活和学习过程中，注意节约能源，自觉地 保护环境，养成良好的环保意识。 主题：生物能源 学科素养：人与自然 难度系数： Seaweed As Future Source Of Fuel And Food Seaweed has many benefits; it may replace plastic as a

2、future source of fuel and food. Seaweed is classified as algae. It is fast growing, uses energy from the sun, and consumes carbon dioxide and nutrients from seawater. Scientists are suggesting that seaweed may be able to help mitigate(减少；缓解) carbon emissions and climate change. A seaweed cultivation

3、 rig is fixed to the seafloor. It has ropes that are latticed(制成网格的) and have lengths of 50,000 meters or 164,000 feet. The strings are designed so that they can withstand large and rough waves. According to seaweed producer and Ocean Rainforest managing director Mr. Gregarsen, the rigs main structu

4、re goes down 10 meters to avoid large breaking waves. They have cultivation areas in the North Atlantic in Denmarks territory(领土，领域). According to Mr. Gregarsen, the site is rich in nutrients and has deep waters. Also, its temperature ranges from 6 to 11.All of these factors make the area ideal for

5、seaweed growth. This year, they will be getting in about 200 tons. Gregersens group is one of many seaweed farms set up in North America and Europe due to increasing demand from various industries, including the food sector. It is gaining demand because it can be used as feed and food, and it can al

6、so replace fossil fuel- based plastic packaging products. Ocean Rainforest has recently been funded by the US Department of Energy to copy its Danish system and build a similar California one. California wants to start industrialized production for use as biofuels(生物燃料). Gregersens company is planni

7、ng on doubling production this year. They are planning to mechanize their production and make their operation large-scale and more efficient. Gregersen says only a few companies can make seaweed a profitable venture. Dried seaweed is used in the manufacture of food, while fermented seaweed is used a

8、s animal feed. Seaweed extract has many benefits, such as cosmetics, toothpaste, pet food, and medicines. These products have seaweed-derived hydrocolloids(水 状胶质；水状胶体) made in many ways. More products may find seaweed useful. Many firms currently work on making alternatives to plastic and textiles.

9、Soon, seaweed may be used as water capsules, drinking straws, and biodegradable packaging. 1replace /rples / vt.取代；代替 2classify /klsfa / vt.分类 3cultivation /kltven / n培养；培育 4withstand /wstnd / v承受；抵挡 课标词汇 5structure /strkt / n结构；构造 6demand /dmnd / n&vt.要求；需求 7fund /fnd / vt.资助；n.资金 8manufacture /mnj

10、ufkt(r) / n制造 1be classified as 被归类成 2range fromto从到排列 3be funded by 被资助 重要短语 Scientists are suggesting that seaweed may be able to help mitigate carbon emissions and climate change. 分析：句中的动词suggesting在此处意为“认为”，不表示 “建议”，所以其后的宾语从句中的谓语动词用的是陈述语气， 而没有使用“should动词原形”结构。 译文：科学家表示，海藻可能有助于减少碳排放和气候变 化。 句型精析 核心素养目标 【语言技能】 听、读、说有关环境保护话题的语言材料； 掌握本单元的重点词汇、短语和句式； 学会使用关系副词w