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. There isn't a box under my bed.
2. There is a cat on the closet.
3. There are two dogs in the room.
4. There are many CDs in the box.
5. There isn't a computer on the desk.
6. There is a lamp near the bed.
7. There aren't three jackets in the wardrobe.
8. There are two pillows on the bed.
9. There is a kite in the room.
10. There are three pencils in the pencil case.
11. There are many oranges in the tree.
12. There is an umbrella in the car.
13. There are three men in the shop.
14. There are ten students in the living room.
15. There is a dog in the garden.
16. There is a cup on my desk.
17. There are ten English books in the room.
18. There are two rubbers in the cupboard.
19. There are two computers in my office.
20. There is a calendar on the wall.
