1. But rock phosphate is a finite resource and the biggest supplies are mined in politically unstable places, posing risks to the many countries that have little or no reserves.
2. Phosphate use has increased in the last 50 years as the global population has grown and the date when it is estimated to run out gets closer with each new analysis of demand.
3. With some scientists projecting that moment could come as soon as a few decades’ time.
4. “Phosphate supply is potentially a very big problem,” said Martin Blackwell, at Rothamsted Research, an agricultural research centre in the UK, and lead author of a new study. “Currently the population is growing and we are going to need more food.”
5. “In a few years' time, it could be a political issue with some countries effectively controlling the production of food by having control of rock phosphate supplies,” Blackwell said.
Объяснение:
Russia
23 October
Thank you for the letter. I'm writing to tell you about animals at our zoo.
I go to the zoo every summer. I can see a lot of animals there. There are lots of different kinds of animals. There are African savannah animals, like lions or giraffes in the east of the zoo, they usually sleep or eat in the zoo, because they are very tired of humans. The absolute opposite of them, Arctic and Antarctic animals in the west. For example, there are some penguins and polar bears. They don't like sunny weather, so they often become ill in the summer. So, just swim in the cold water or lay in the aviary. What animals do you have at your town's zoo? I hope to see them as soon as possible!
I have to go. Write back soon.
Love,
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