· Listening,Transcript

Bên cạnh Hướng dẫn đề thi IELTS 11/21/2020 bài WRITING TASK 1 (map) về school library (kèm bài sửa cho HS đi thi), IELTS TUTOR cũng cung cấp transcript bài tập dạng Short Answer IELTS Listening.

Chuyên đề 3

But can we really feed a population of 9 billion people, which we will have by 2050? And it'll peak, according to the United Nations median projection, at about 9.2 - 9.3 in about 2070, but can we really feed that number of people? Well, at the moment, we need a large proportion of the earth to feed 6.9 billion people. So if we add another 2 billion people and we ask and we enable them to eat chickens and pigs and all these things we like to eat, uh, then we're gonna need, need a lot more land. Now, be nice to do all this organically but the problem with that is we're gonna need a lot more land for the cattle whose fertilizer is going to be who's who's been here is going to be used as fertilizer sector. So we're gonna need even more land. If we were using the mostly organic farming technologies of the 1950s today, we will need probably twice as much land to produce the same amount of food as we produce today.

So let's not do that. Unless treble yields, if we treble yields in farming. We could actually feed 9 billion people from a smaller acreage than we feed 6.9 billion today. So can we treble yields? Well, we just done it in the last 60 years we treble yields. This is the yields of rice wheat and maize, the big three cereal crops which provide about 60 percent of human categories. And they trebled over that time, despite taking effectively no extra acres, um, under the plow, nobody thought this could be done. We were told repeatedly throughout this period, by our environmentalists such as Lester brown, that it could not be done and yet it was done. And how was it done? It was done by getting dwarfing genes into wheat. So that, that we, it, they put more of their energy into seeds rather than stalk. It was done by the use of machinery and chemicals and fertilizers and all these things that raised, raised yields in farming >> IELTS TUTOR hướng dẫn Cách dùng động từ "treble" tiếng anh

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