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.
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ответ
Объяснение:
Dear Stuart,
I'm sorry to hear you've been having problems at school. Here's what you can do to improve your situation.
Have you thought about talking to the school counsellor, your parents or a teacher? If you do this, bullies won't pick on you because they will know that somebody is supporting you. Another good idea is to try to overcome your shyness. This way you would be able to make some friends and start enjoying your time at school. If bullies see that you have friends, they will leave you alone.
I hope that my advice helps and everything turns out all right.
Yours,
Diana
