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  3. It will be made in a similar way to brewing beer. We are not talking about a new kind of drink, however, but describing a new in

It will be made in a similar way to brewing beer. We are not talking about a new kind of drink, however, but describing a new in

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问题     It will be made in a similar way to brewing beer. We are not talking about a new kind of drink, however, but describing a new industry aiming to grow meat in the lab. This new food is known as clean meat, cultured meat or cultivated meat.
    Demand for meat has never been higher, but the way we produce it today is unsustainable. So scientists around the world are learning to grow meat and seafood in their labs without the need for farms or livestock. They have had considerable success—the world’s first lab-grown beef burger was cooked and tasted in London in 2013, though at a price of around $250,000, but costs have dropped since then. The challenge now is to turn these lab-based successes into food that can be sold on supermarket shelves at reasonable prices.
    This revolution is desperately needed. The world’s population is growing, with another 2 billion expected by 2050. Demand for meat is expected to grow by 70 percent, significantly increasing the pressure on limited resources such as land and water. This in turn will drive climate change. Today, livestock farming is responsible for 15 percent of global greenhouse gas emissions and is a key cause of deforestation. If meat could be grown in the lab instead of on farms, it could create an alternative to traditionally-produced meat and help reduce the environmental footprint for meat production.
    Cultured meat is produced using some of the same technologies biologists have used for decades to grow animal cells. First, muscle cells are taken from live animals, from which stem cells are isolated and then cultured in the lab. The next stage is more difficult, however. The cultured cells must then be grown and separated into a form of tissue comprising of muscle, fat and other cells that is suitable for food processing and consumption. Finally, this tissue will be processed and formed into products such as burger meat, sausages or shrimp meat.
    Currently, around 60 start-ups around the world are developing and improving the cultured meat process to make different meats and seafood. And they are all looking to scale up production while bringing down costs. So when will the fruits of this cellular agriculture reach the supermarket shelves? In the next few years we can expect a few launches of small-scale products in high-end restaurants. It will be a pretty expensive burger in a restaurant in Hong Kong or San Francisco, however, by 2030 you might see them on supermarket shelves at a decent price.
The author believes this revolution is desperately needed because________.
选项 A、growing population will take up the spaces of livestock
B、livestock farming pollutes the limited resources like land and water
C、cultivating meat in labs can reduce the negative impacts on the environment
D、cultured meat is an alternative to traditionally-produced meat
答案C
解析 细节题。根据题干关键词desperately needed可定位至第三段。A项无中生有，该段第二句说的是“The world’s population is growing，with another 2 billion expected by 2050”. 并没有说不断增长的人口将占用牲畜的空间，故排除。B项是非混淆，第三句说“Demand for meat is expected to grow by 70 percent，significantly increasing the pressure on limited resources such as land and water”。即“届时，预计对肉类的需求将增长70％，这将大大增加对土地和水等有限资源的压力”，并没有提及畜牧业污染有限的资源，故排除。C项cultivating meat in labs can reduce the negative impacts on the environment是对第三段最后一句“help reduce the environmental footprint for meat production”的高度概括，故正确。D项虽然是对事实的描述，但并不是这场革命是迫切需要的原因，故也排除。
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