In certain countries, there has been rapid 0 _____ in the spending power of teenagers. Realising this, firms are aiming even more of their 17 at young people, and 18 they are doing this by advertising directly in schools. These companies see children as the 19 of the future, and hope that when they become adults they will maintain their 20 to brands they first started buying in their youth.

As a result, many 21 are keen to supply equipment to schools, sponsor sports activities or provide students with kit that carries their logo. Other firms install machines selling snacks and drinks, and these are often highly 22 for both the companies and the schools.

There is, however, considerable 23 about whether this is a good idea. Some claim these firms provide a useful service, but others argue that these machines encourage 24 eating habits at a time when many doctors are concerned about the diet of the young.