VOA慢速英语[健康报道] 藻类可能有助于解决世界饥饿

来源:VOA 2019-03-17




 Algae May Help Feed a Hungry World 

From VOA Learning English, this is the Health & Lifestyle report.
Nearly 790 million people around the world do not get enough to eat. Most of them live in developing countries.
Many parts of the developing world do not have transportation systems in place that can bring food to people. It can be difficult to get food to those who need it without good roads and other necessary infrastructure.
But there is a deeper problem.
Growing or raising enough food to fight world hunger requires land. If we are talking about raising cattle for their meatthat means a lot of farmland and other resources.
A group of researchers in California may have found a way to get protein to hungry people.
Stephen Mayfield is a geneticist at the University of California, San Diego. He notes that many people are concerned about calories, the energy-producing value in food.
Mayfield specializes in algae, the scientific term for simple, plant-like organisms. He says algae have two things that the world needs: protein and lipids, or fatty acids.
"The world, in fact, is not short of calories. What they're short of is proteins and essential fatty acids. So, algae are naturally very high in proteins and in lipids and those are sort of the two things that the world really needs.
So, Mayfield and his team have created a dried, powdered form of algae. They break down the organisms into extremely small particles, which can help simplify the problem of transportation.
Not only is the algae rich in protein and easy to transport, it also tastes good.
Again, here is Mayfield.
"Here's one that we've just finished up and so what we do is we simply take this and dried it out. And as you can see, it makes a very nice green powder and that is perfectly edible. In fact, it tastes pretty good."
And growing algae uses less land than other kinds of protein. Mayfield's big idea is that algae farms could one day replace the huge amounts of land used by farmers to produce protein, in beef from cattle or soybeans.
"I'm actually really encouraged by these new companies that had started up to make these synthetic plant-based protein substitutes that look just like meat, right? Because now, 'oh that looks like something I'm familiar with. I want to eat that.' But if I could make that with algae protein instead of with beef protein, an enormous environmental benefit and probably an enormous cost benefit as well."
The United States government provided money for Mayfields research. His team just successfully finished a test in which they grew algae in an outdoor environment.
Mayfield adds that algae food products are not yet available for sale. But in the future algae may be one way to help feed the worlds hungry people.
And thats the Health & Lifestyle report.
Im Anna Matteo.
小编精心为大家从普特英语听力网论坛整理了2016年下半年度【7月-12月】的精精听内容— VOA standard (快速英语),(该整理材料为截断后简短的内容,每个音频都在一分钟左右,适合进行听写训练)想提高听力的小伙伴可以扫码购买只需9块9!掌握英语,从听开始!