Category World Geography

WORLD ATLAS – ASIA

Asia is the largest continent. The northern part is taken up entirely by Russia, where icy tundra and coniferous forests dominate the landscape. Further south are the barren grasslands, or steppes, of Central Asia. These merge into vast areas of desert that are bitterly cold in winter.

Much of southwest Asia, known as the Middle East, is also covered by desert, but this is hot, dry and often sandy. South of the world’s highest mountain range, the Himalayas, the countries of southern Asia have a monsoon climate. Long periods of hot, dry weather are followed by heavy rains. To the southeast, a peninsula reaches out towards the many islands of Indonesia, where important areas of dense tropical rainforest are found.

Large areas of Asia are virtually uninhabited, but Asia still has much the largest population of any continent. In the south and east, several countries have become wealthy from their rich reserves of oil or their successful technological industries. In many other countries, however, poverty is rife. Most people farm for a living, and are vulnerable to floods or droughts. Asian cities are growing larger as more and more people move in from the countryside to try to find work.

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WORLD ATLAS – RUSSIA

Stretching between two continents, Europe and Asia, Russia is the largest country in the world. Until 1991 it was part of the Soviet Union. Most of Russia’s population lives west of the Ural Mountains, in the European part, many in the big cities of Moscow and St. Petersburg. Also in this area lies a good part of Russia’s farmland, producing cereals and root crops.

East of the Ural Mountains is Siberia, a vast area of sparsely populated land. The climate is harsh, with frozen tundra in the north and thick coniferous forest, known as taiga, further south. The deepest lake in the world, Lake Baikal, is found in the south-east. Siberia is rich in coal, oil, gas and metal ores. The region has a small population, but a large number of different peoples.

Scattered around the fringes of the Arctic Ocean are a number of small communities. They herd reindeer or cattle, and use animal skins to keep warm as their ancestors did.

The Trans-Siberian Railway runs from Moscow across the southern part of Siberia. It is a vital link for people and industry between east and west. The longest line in the world, it takes eight days to travel.

Since the collapse of the Soviet Union, Russia, for all its natural mineral wealth, long-established industries and advanced technology, is struggling to develop its economy.

CENTRAL ASIA

Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan are the Central Asian republics. Much of the region is desert and dry grassland, with mountains to the south. There are reserves of coal, gas and metal ores.

South of the Caucasus mountain range lie Georgia, Azerbaijan and Armenia. Their fertile land produces many crops, and also has reserves of oil and gas. The Caucasus contains many different ethnic groups and often experiences conflict.

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WORLD ATLAS – SOUTHEAST EUROPE

The Balkans, which makes up most of south-east Europe, are lands of rugged mountains and deep valleys. Winters are cold, but cotton, tobacco and grapes can be grown in the warm summers. Several of these countries were once part of Yugoslavia. The creation of new borders, as well as clashes between ethnic groups, has led to conflict.

Greece is one of the oldest nations in Europe. As a mountainous country, farming space is limited, and its olive groves and vineyards are scattered along the hillsides. Greece has many islands, and a large part of its economy relies on a large shipping industry and tourism.

Turkey is split between Europe and Asia by a narrow stretch of water called the Bosporus. Turkey’s coasts are warm, but the dry grasslands of its interior can be bitterly cold in winter. Turkey is famous for its craft industry, especially carpets and pottery. Its Mediterranean coastline and ancient sites also make it a popular tourist destination.

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WORLD ATLAS – CENTRAL AND EASTERN EUROPE

Much of central and Eastern Europe is flat, low-lying land. A large part of this is given over to farming, but native forest still remains in upland areas, where elk, wolves and bison roam. The northern part of this region has warm summers but cold winters. Crops such as potatoes and cereals are grown, and animals are farmed for their milk and meat.

Heavy industries such as mining, metal-working, car production and glass-making are important for the economy of Poland. Pollution from the burning of coal to produce electricity, and from factories and cars, threatens the environment.

In the south, the forested Sudetes and Carpathian Mountain ranges rim the Czech Republic and cover much of Slovakia. Cereals, root vegetables and livestock are farmed in the valleys. The fertile lowlands of Hungary are scattered with orchards and vineyards. All three countries have vehicle, chemical and textile industries.

The undulating lowlands of the Ukraine with their fertile “black earth” have long been intensively cultivated. There are fields of wheat, barley, sugar beet and sunflowers. Manufacturing is concentrated in the Ukraine’s southeastern cities.

The borders of Central and Eastern Europe have changed many times over the years. Until recently, many countries were controlled by, or were part of the former Soviet Union. They are now independent, and grow in prosperity.

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WORLD ATLAS – ITALY

 

Surrounded on three sides by the Mediterranean Sea, Italy is shaped like a boot about to kick a stone – the island of Sicily. The Alps, including the jagged, limestone Dolomites, form the border in the north. Running the length of the boot down to the toe are the thickly-wooded Apennines. Both Sicily and Sardinia are rugged, hilly islands.

Italy also has three active volcanoes: Vesuvius, Stromboli and Etna. In AD 79, Vesuvius erupted, burying the town of Pompeii. The remains of a great Roman civilization have since been uncovered.

Northern Italy is more prosperous than the south, Sicily and Sardinia. There are major industrial cities such as Milan and Turin, vineyards, and fields of wheat, maize and tomatoes.

The Vatican City, which lies within the city of Rome, is the smallest independent state in the world. It is home to the Pope, the head of the Catholic Church.

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WORLD ATLAS – SPAIN AND PORTUGAL

The Iberian Peninsula, divided between the countries of Spain and Portugal, is separated from the rest of Europe by the Pyrenees Mountains. The core of the peninsula is a plateau called the Meseta, a landscape of plains crossed by several mountain ranges.

Spain has four official languages – Galician, Catalan, Basque as well as Spanish -and several dialects. The north of the country, Spain’s industrial heartland, is cooler and wetter. Central Spain is much drier. Large areas are barren or given over to rough pasture for sheep and goats. Tourist resorts have grown up along the Mediterranean coast. Andalucía is famous for bull-fighting, sherry, orange trees and flamenco dancers.

Portugal has long held close ties with the sea. Famous for its explorers, Portuguese sailors founded colonies in Africa, Asia and America more than 500 years ago. Today, farming and fishing are among the main industries – supplying the world with anchovies, sardines, shellfish, cork and port, a sweet wine produced in the region near Porto. Along the drier south coast is the Algarve, popular with tourists.

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What main factors are threats to environment?

People have made many changes to the world they live in and some of these have had harmful consequences. As the world population increases, there is more need for bigger cities, new towns and farming land. Land has to be cleared, destroying the habitats of many animals and plants. Some of these are now extinct and others are in danger of becoming so. Hunting has also put animals in danger.

There is now nearly three times as much desert in the world as there was 100 years ago. This is partly due to farmers over-grazing their animals on the meagre grass and shrubs and to the clearance of woodland trees for firewood.

Industrialization is a major threat to the environment. Pollution is just one example. Factories discharge harmful chemicals into rivers and seas, killing fish and plants.

The production of chlorofluorocarbons (CFCs) is reckoned to be responsible for damaging the ozone layer, the protective layer in the Earth’s atmosphere that prevents harmful rays from the Sun reaching the surface. CFCs are synthetic chemicals used in aerosol sprays and refrigerators. When they are released into the atmosphere, they destroy the ozone. There is now a hole in the ozone layer above Antarctica.

Air pollution is caused by fumes and smoke from vehicles, factory chimneys and power stations. Poisonous gases, such as sulphur dioxide, mix with rain and mist to produce acids. When the acid rain falls, it kills plants over a wide area. Burning fuels also causes a build-up of carbon dioxide.

Carbon dioxide and CFCs are both greenhouse gases. In the right amounts, greenhouse gases in the atmosphere trap heat from the Sun so the Earth is not too hot or too cold. But if the greenhouse gases build up, too much heat is trapped and the Earth becomes warmer. This change in climate, known as global warming, could have disastrous effects. The ice in the Polar Regions may melt, causing severe flooding to low-lying areas. Changes in the climatic pattern worldwide could lead to violent storms and long droughts.

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What is the basic structure of wealth and poverty in various parts of world?

Some nations in the world are rich, while others are very poor. The gap between them seems to grow ever wider. Measured by the average income earned by people in the richest and poorest fifth of the world’s nations, the gap has grown from 30 to 1 in 1960 to nearly 80 to 1 today. Within both rich and poor countries, there are also great contrasts in wealth.

The wealthiest countries are those that have developed industries and services which can supply their own populations with all their needs. They do this either by producing these products and services themselves, or by importing them from other countries, paying for them by exporting goods. In poorer developing countries, people may produce only enough food to feed their families. Disease and climatic disaster may prevent even this.

The population of developing nations has grown greatly in recent years. Their high birth rates means even more mouths to feed.

South America has some of the fastest-growing cities in the world. They include the Brazilian super cities of Sao Paulo and Rio de Janeiro, both with populations of more than 10 million. People from the countryside flock to these cities to find work but there is nowhere for them to live. They build their own shantytowns (locally known as favelas) just outside the city by building shelters and shacks from any material that comes to hand. People who live in shantytowns cannot find work easily and so they are forced to work for very low wages.

The wealth of a nation can be measured by its gross domestic product (GDP).This is defined as the value of all the goods and services produced there, including those produced by foreign-owned firms. The Group of Seven (G7) are the seven leading industrial nations of the world. These nations – the United States, Japan, Germany, France, the United Kingdom, Italy and Canada – account for more than 60% of the world’s GDP. The country with the highest GDP per person in 1996 was Switzerland ($46,000). In the same year, the figure for Rwanda in Africa was $100. More than 1.3 billion people around the world live on less than one dollar a day.

Wealthy nations such as the G7 lend money to developing countries. However, the developing countries often find that, because of their low GDP, they cannot repay the loans and a big debt burden builds up. The largest foreign aid donor in 1996 was Japan with aid amounting to more than $15,000 million.

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What are the famous bridges in the world?

Bridges have been used since ancient times to span deep ravines, rivers and other stretches of water. Early bridges were made of wood which rotted easily and could not span great distances. In some parts of the world, people made bridges from wood and rope. They had walkways made of wooden slats and rope handrails. Bridges made of stone may last for centuries. However, stone is heavy to transport and long bridges need to have many sturdy supports.

During the Industrial Revolution, which began in the 18th century, engineers began to build bridges made from iron. These were much more durable than wooden bridges and could span longer distances than stone ones. The first iron bridge was built at Coalbrookdale, England, in 1779.

Modern bridges are built using steel and concrete. They may carry roads or railways over rivers, wide estuaries or high valleys, or above other roads and railways. There are a number of different kinds of bridge design available, each of which may be used in a modern bridge according to the type of crossing required.

A beam bridge is one of the simplest and oldest designs. The beam is supported at each end. The earliest bridges were tree trunks or stone slabs laid across a stream supported by the banks on either side. A clapper bridge is a type of Beam Bridge which is supported from beneath by several columns in the river bed or ground. The deck may be flat or made from a hollow girder (truss) containing the road or railway.

An arch bridge—a very strong type—has a deck supported on an arch fixed to the banks. Some arch bridges are too low for river traffic to pass underneath so a part of their span may be a bascule or lift bridge.

This can be raised in the middle like a drawbridge so that ships can pass through.

A cantilever is a beam or structure that is fixed at one end only. Cantilever bridges are built in two halves, with each beam cantilevered out from the bank and each half balanced on a support in the river. There may be a short central span where the two halves meet.

Suspension bridges can span long distances. The towers of the bridge are built first and long steel cables are suspended from the towers. Lengths of cable called hangers are fixed to the suspending cables. The deck of the bridge is lifted into position and attached to the hangers. Suspension bridges are ideal for long, high spans as they do not require a row of supporting columns that may interfere with river transport. One of the most famous examples of a suspension bridge is the Golden Gate Bridge (1280 metres), near San Francisco in the USA, which was completed in 1937.

A cable-stayed bridge has diagonal steel cables running from high supporting masts at either end connected to the deck of the bridge. The weight of the deck is supported by the masts.

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Which types of buildings are called Skyscrapers?

Skyscrapers are very tall buildings, usually more than 20 storeys high. Their weight is supported by a steel frame rather than outside walls. They are a feature of many large cities, especially in North America and East Asia, where the high price of land leads developers to build tall, thin buildings that occupy the minimum amount of land space, rather than low-rise, sprawling ones.

The first skyscraper, the Home Insurance Building, was built in Chicago in 1884 following a fire that devastated the city. Soon, skyscrapers started to appear in New York as well as Chicago, often being built higher and higher in competition with one another. In recent years, Japan, Malaysia and China are among nations that have joined the race to build the world’s tallest buildings.

The John Hancock Center in Chicago, USA, was completed in 1968. A skyscraper with both offices and residential apartments; it is the tallest multi-purpose building in the world and the seventh tallest skyscraper of all. It is 344 metres high but its twin antennae add a further 105 metres, making it a total of nearly 450 metres. It has a hull and core construction—a strong central concrete core with an open space between it and the steel frame. The frame has a triangular grid to give the structure maximum strength.

The John Hancock Center is like a city in a tower. It has shops, a bank, a post office, a restaurant, a swimming pool and a fitness centre. There are 50 lifts (it takes only 39 seconds to ascend to the 94th floor). A car park with spaces for 1200 cars takes up the first seven floors. Cars drive up a spiral ramp to get to it.

The building has more than 2000 kilometres of electric wiring, carrying enough electricity to supply the equivalent of a city of 30,000 people. More than 2.75 million litres of water are consumed each day. Computers warn of any fault in the skyscraper’s service systems.

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