UNIT 6 课时跟踪检测2 语言运用综合练（Word练习）-【新课程学案】新教材2023-2024学年高中英语选择性必修第一册（外研版2019）

UNIT 6 课时跟踪检测（二） 语言运用综合练 Ⅰ.阅读理解 More than 45,000 years ago, by the shore of present­day Tasmania，a local person picked up a large piece of thick, dark brown seaweed. And he realized that this giant piece of seaweed could be used to make a watertight bag.And 45,000 years later in mainland Australia, people are again turning to seaweed to solve pressing problems.Today, it is used to address the world's climate crisis. Winberg, a marine ecologist at the University of Wollongong, has spent decades studying seaweed. She believes seaweed's fast growth rate and ability to absorb vast amounts of carbon dioxide can help fight climate change, deacidify the ocean, and change the way we farm, not only in the ocean but also on land. “If we used the infrastructure we have in the ocean and created seaweed islands, we would actually get rid of many climate change issues we have today，” says Winberg. Realizing seaweed's potential as a climate solution, Winberg opened Australia's first land­based, commercial seaweed farm in 2013. On her farm in New South Wales, Winberg produces seaweed extracts (提取物) that are used in food，cosmetics and medicines. Like plants on land, seaweed absorbs CO2 and grows biomass (生物量)．Coastal marine systems can absorb carbon at rates up to 50 times greater than forests on land, according to Emily Pidgeon, senior director of strategic marine initiatives at Conservation International. Globally, seaweed is thought to absorb nearly 200 million tons of CO2 every year — as much as New York State's annual emissions. And when seaweed dies, much of the carbon locked up in its tissues is transported to the deep ocean. By raising pH levels in the ocean, seaweed also improves growing conditions for shellfish such as oysters and mussels, whose shells become more fragile (脆弱的) in acidic environments. The potential for seaweed cultivation doesn't stop in the ocean.Winberg has found there are benefits of doing it on land too.She believes that seaweed farming offers “hu