Compare the two extracts below:

unemployment, so cheap heating is especially important for them. They have raised the £2 million cost from development agencies. cThe new system, which will be the first of its kind in Europe, will lead to a healthier environment by cutting CO 2 emissions , and should also create three full-time jobs. 1 . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . . . . . . . . . . . . . . . . . . . 3 . . . . . . . . . . . . . . . . . . . . . . .

4. Underline four key points in the following text.

THE SIXTH WAVE? Lord May, the president of the Royal Society, has claimed that the world is facing a wave of extinctions similar to the five mass extinctions of past ages. He calculates that the current rate of extinction is between 100 and 1,000 times faster than the historical average. The cause of previous extinctions, such as the one which killed the dinosaurs, is uncertain, but was probably an external event such as collision with a comet. However the present situation is caused by human consumption of plants, which has resulted in a steady increase in agriculture and a consequent reduction in habitat for animals. Although many people are still hungry, food production has increased by 100 since 1965. Lord May also pointed out that it was very difficult to make accurate estimates as nobody knew how many species of animals lived on the planet. So far 1.5 million species had been named, but the true figure might be as high as 100 million. Our ignorance of this made it almost impossible to work out the actual rate of extinction. However, the use of intelligent guesses suggests that losses over the past century were comparable with the extinctions of earlier periods, evidence of which is found in the fossil record. 5. When preparing to write an essay you may be concerned with only one aspect of a text, so your key points should relate only to the topic you are examining. a You are preparing to write an essay on ‘Marketing – art or science?’ Read the text below and underline the sections relevant to your essay. BOTTLED WATER UNDER ATTACK The Water Companies Association WCA has claimed that bottled water costs 700 times more than tap water, but is often of inferior quality. The chief executive of the WCA pointed out that although bottled water advertising often associated the product with sport and health there was no truth in this link. The reality, she said, was that the packaging of bottled water was environmentally damaging, since millions of empty bottles had to be disposed of in rubbish tips. 2 of samples of bottled water failed a purity test conducted by the Drinking Water Inspectorate, while only 0.3 of tap water samples failed the same test. Labels on bottled water often referred to ‘spring’ and ‘natural water’, which were meaningless phrases. In addition, bottled water was imported from as far as Korea and Kenya, which was a waste of resources. These criticisms, however, were rejected by the British Soft Drinks Association, which argued that bottled water was a successful business founded on giving the customers choice, quality and convenience. b You are preparing an essay on ‘The application of DNA research to the development of vaccines’. Read the text and underline the relevant sections. NEW LIGHT ON THE PLAGUE The plague, which first struck Europe in the sixth century, was one of the great disasters of history. In the fourteenth century it became the Black Death, when it may have killed one third of the entire population. The microbe that causes the disease lives on rats, and is passed on to humans by the bite of a flea. It still survives today, though outbreaks are less deadly: the World Health Organisation receives reports of 3,000 cases annually. Scientists believe that the microbe was originally a stomach infection, but evolved into a more lethal disease about 1,500 years ago. Now the genetic code of the plague bacterium has been ‘read’ by scientists; a total of 465 million ‘letters’ of DNA. They believe that this will help in the development of vaccines for the plague, one of which has begun clinical trials. In parts of Africa drug-resistant strains of the disease have evolved, which gives added importance to the work, as does the threat that the plague might be used as an agent of bacteriological warfare.