- •Contents
- •Предисловие
- •Introduction to ecology
- •Practical action
- •Population and resources
- •Chemicals in farming
- •The greenhouse effect
- •Conservation of the land
- •Acid rains
- •Preserving the environment
- •Help us help the environment
- •I know That’s a great idea
- •Introduction
- •Increase / lead / create / threaten / result / damage / cause / reduce
- •A lichen pollution test
- •Pollution
- •Transport and pollution
- •Soil erosion
- •Saving the environment
- •Recycling britain
- •Tropical rainforests
- •The amazon rainforest
- •The beauty of scotland – how long will it last?
- •It’s your environment
- •Introduction
- •Weather control
- •The russian climate
- •Types of climate
- •Climate
- •Is the greenhouse effect affecting our climate?
- •Global warming
- •Local news in brief
- •Climate extremes
- •Introduction
- •Britain’s national parks
- •The big five
- •Introduction
- •Biodiversity
- •Coniferous and deciduous forests
- •Siberia’s fauna is amazingly rich
- •The richness and diversity of russia’s natural resources
- •In the estuary of the lena
- •Introduction
- •Losses of biodiversity
- •Ecology: organisms and their interaction
- •Introduction
- •The caspian sea The General Information About the Caspian Sea
- •General Geographical Characteristics of the Caspian Sea
- •Ecological condition of the black sea
- •The ganges
- •The mississippi
- •Introduction
- •The world’s great lake
- •Factfile
- •On the coast of baikal
- •The sustainable development
- •White cliffs of dover
- •About national parks
- •Cairngorms
- •About lake district national park
- •Nature, landscape and the environment
- •Backpacker’s top tips!
- •Drayton manor park
- •The lake district
- •Tourism: a blessing or a curse?
- •Uk wildlife – sos!
- •Heritage coasts
- •Looking after the environment
- •Introduction
- •Introduction
- •Introduction
- •Paragraphs 2 and 3
- •Conclusion
- •My home – love it or hate it!
- •Hints on writing business letters
- •Curriculum vitae
- •Business letter
- •Types of Business Correspondence in the Contemporary Office
- •How to become a good presenter
- •How to use visual aids
- •Expressions to introduce and explain your visuals
- •Four Basic Types of Questions:
- •The do’s and dont’s when presenting youself in public
- •Attitude Knowledge Skills
- •The do’s and dont’s when presenting youself in public
- •The do’s and dont’s when presenting youself in public
- •The do’s and dont’s when presenting youself in public
- •Supplementary reading
- •Environment
- •Human impact on the natural environment
- •Environmental protection
- •Environmental factors
- •Modification of the atmosphere
- •Pollutants in the Atmosphere
- •What’s going to be like tomorrow? andy gray explores the science of modern weather forecasting
- •How are people affected by a
- •Volcano eruption?
- •The great forests
- •Deforestation
- •Malaysia
- •South America
- •The greenhouse effect
- •Shenandoah national park
- •Conflicts in national parks
- •The temples of nature
- •Desert plants
- •Save our seeds
- •The man who can survive anywhere
- •Ecotourism in russia: perspective regions, resources, achievements of international projects, possibilities for cooperation
- •Infrastructure:
- •Information, marketing:
- •Nature conservation management plans
- •The purpose of a management plan
- •Vocabulary
- •Bibliography
- •Useful links
- •Английский язык Учебное пособие
- •625003, Г. Тюмень, ул. Семакова, 10.
The great forests
On the western slopes of the United States, south of Puget Sound, warm, gentle rain falls almost constantly. On these mountain slopes, giant Douglas firs grow as they grow nowhere else in the world. For kilometres, pine and fir and other evergreen trees cover the western side of the Cascade Mountains. Farther south, in California, there are the great redwoods, the largest and oldest living things.
When America was first discovered, forests covered more than half the area that is now the United States. Trees had to be cut down to prepare the land for farming and to provide shelter and fuel. In addition, the pioneers travelled in wooden boats and wooden wagons, drawn over wooden roads and bridges. They used wood for their houses, furniture and tools.
As America grew, the need for timber increased, and by the time settlers had reached the Midwest, industry needed wood in vast quantities. Railroads stretched father and father westward, and lumbermen harvested what then seemed like limitless reserves of trees.
What was not at first realized was that a forest is more than a collection of trees. It is a complex community of plant and animal life. Each tree must have sunlight, moist rich soil, and enough space for its roots. At the same time, it is a source of food for birds and animals, and protects the soil from erosion. By absorbing rainwater and slowing the melting snow in the spring, it lessens the danger of floods and regulates the flow of streams.
In a living forest, two opposing forces are constantly at work: growth and decay. The growth of new seedlings balances destruction by insects, plant diseases and occasional storms. But the unrestricted cutting of timber disturbs this natural balance and in America in earlier years, many forests were depleted more rapidly than they could grow. On such cutover land, fires burned out of control, wildlife disappeared, and worst of all, the rich soil of the forest floor was washed away by unchecked rain water.
About the beginning of the 20th century, the national government became concerned about the disappearing forest and in 1905, created the Forest service in the Department of Agriculture, giving it three major responsibilities: to manage the national forest for the public welfare; to cooperate with the states and with the owners of private forest land to prevent and control fires, plant trees, improve watersheds, and fight insects and diseases; and to undertake research in forest management, use and protection.
More than 75 million hectares of timber and range lands are now managed as national forests and national grasslands to serve many purposes including recreation and the continuing yield of such resources as wood, water, wildlife, forage and special products like honey, nuts and Christmas trees.
About 75% of US forest land is on farms and other small, privately owned tracts. In cooperation with the states, the national government is encouraging better management of these lands by providing information and technical assistance, cost-sharing, and low-cost loans. Under this cooperative programme, the Forest service has given technical help to more than 2,124,000 owners of forest land. Since 1940 some 50 million hectares have been involved. These owners have planted more than 1.2 million hectares and have improved timber stands on another 1,000,000 hectares.
Forest industry organizations also encourage better management. Perhaps the least known programmes are those called “Keep America Green”, a fire-prevention project, and the American Forest Institute’s tree-farm-system under which 41,600 privately owned tracts covering about 33 million hectares have been set aside as tree-farms, where modern methods are used for growing high-quality plants. The ‘farms’ range in size from about four to 897,596 hectares.
Each year, owners of private forest land and national, state and local agencies plant or seed more than 520,000 hectares. Practices like these, combined with better protection from fire, disease, insects and other destructive agents, have brought enormous improvement to the forests of America. Timber growth in its woodlands now exceeds the loss that comes from destruction and cutting, and a good reserve is being built to meet future needs.
► 1. Forests cover more than half the area of the United States.
2. A forest is a collection of trees.
3. Trees protect the soil from erosion.
4. Wildlife mostly disappeared because of unrestricted cutting of timber.
5. There are private forests in America.
6. National forests are a source of wood for building houses, furniture manufacturing.
7. Forest land owners have to pay much to the government to be provided with technical assistance.
8. Forest land owners cut trees in harmony with nature.
9. Private forest land and national, state and local agencies work side by side.
10. Timber growth in its woodlands now prevails the loss that comes from destruction and cutting.
(Bryant, Richard H. Geography Made Simple, Oxford, 1993)
11. You are going to read the text Deforestation and some quotations from a number of writers around the world. Read and decide how important forests can be in people’s lives. Give reasons.
