(
课件网) UNIT 3 CONSERVATION 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 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 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 rig’s main structure goes down 10 meters to avoid large breaking waves. They have cultivation areas in the North Atlantic in Denmark’s 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 seaweed growth. This year, they will be getting in about 200 tons. Gregersen’s 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 also 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). Gregersen’s company is planning 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 as 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. Soon, seaweed may be used as water capsules, drinking straws, and biodegradable packaging. 1．replace /r??ple?s / vt.取代；代替 2．classify /?kl?s?fa? / vt.分类 3．cultivation /?k?lt??ve??n / n．培养；培育 4．withstand /w???st?nd / v．承受；抵挡 ○课标词汇 5．structure /?str?kt?? / n．结构；构造 6．demand /d??mɑ?nd / n ... ...
