Acid rain 1) was discovered (discover) by a Scottish scientist in the 1850s, and since the 1960s a lot of research 2)……. (done) about it. It 3)…….. (mainly cause) by factory smog and car fumes. At every moment these chemicals 4)……. (release) into the air. There, they mix with water and 5) ……. (store) in clouds until it rains. Recently, many famous buildings and statues 6)…… (damage) by acid rain and in the future scientists predict that huge areas of forestland 7) …….. (destroy) by acid rain. Acid rain can 8)…… (reduce) if we burn fewer fossil fuels, but we need to act now!

1 I have heard both reports. The first was much more interesting than the second.
2 This text is even more difficult than the one we translated recently.
3 It is an extremely important issue.
4 Every day the weather is getting worse.
5 Today it is hotter than it was yesterday.
6 I did not think that my new work would be so difficult.
7 This problem is not as serious as you think.
8 The language of this article is easier. Start with this one.
9 We need smaller cabinet as the room cis small.
10 Your brother is a very capable man; he is the most capable of our young scientists.
11 I advise you to go this way because this is the way to go.
12 The coat is not worse after it has been cleaned.
13 The more you are in the open air, the better your health will be.
14 Who is the best athlete in the team?
15 This time I have fewer mistakes than I had in my last essay.

Tourists - people who travel around the country or go abroad in order to get a good rest. In popular tourist areas well-developed infrastructure, which is why today, in many countries, tourism is one of the most important industrial sectors. As you know, three quarters of tourists are citizens of the twenty richest countries in the world and most of them prefer to travel to Europe or North America. However, according to recent data, more and more tourists are visiting and other parts of the world. Someone wants to take a picture of a safari in the African reserves, and someone to conquer the Himalayas.
 
Tourism as a sector of the economy of the country, can be very productive and profitable in solving complex problems that satisfy the one hand the interests of regions and organizations engaged in tourism, the presence of permanent and sustainable source of income, and on the other hand - the interests of end consumers - tourists from Russia and other countries.
 
 Tourism also accelerates the development of a number of industries: construction, production of goods increased tourist demand, Urban Affairs, and others. In Europe, created a pan-European system of tourist roads, helped by a large influx of sleeper. Tourism has stimulated the development of production of souvenirs, jewelery, printing, specialized in publishing books for tourists. Tourism - one of the major sources of creating new jobs.
 
Accompanied by the development of tourism as well as the advantages and difficulties, although it contributes to employment. Poor countries have to find huge funds for the construction of roads, airports and other facilities in areas frequented by tourists. This fact shows that it is much less money goes to the development of vital sectors of the economy for their own citizens. Another drawback is that the influx of tourists adversely affecting the ecology of those areas they inspect. For example, the oldest buildings of Greece and Egypt attract large numbers of tourists, but the emissions from vehicles cause harm them unique.
We conclude that this is still a developing tourism industry, which provides great opportunities tourist country in the growth of the economy and partly destroys what these countries to attract tourists!