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:
1. What colour is your new hat? - It's the same colour.
2. Is there a refrigerator in your kitchen?
3. Where is the refrigerator in your kitchen? - It is in the corner of the kitchen.
4. There are flowers in our living-room. The flowers are in a beautiful vase.
5. I have tea in my cup.
6. He has no coffee in his cup.
7. I have books, exercise-books and pens in my bag.
8. I am an engineer. I work at the office. I go to the office in morning. As the office is far from the house I live in, I take a bus to get there.
Объяснение: