Rivers

Rivers are the blue arteries of the world. They run through the whole planet, making falls and falling into lakes and seas. Rivers are very important not only for the nature of the planet but also for people. Before, people even drank water from rivers. Unfortunately it is impossible nowadays as rivers are so polluted that even swimming in them may threaten your life and cause different diseases of the skin. Rivers are also very important for industry and rivers are the main sources of electricity.

There are a lot of rivers in the world. The longest river is the Nile. But recent researches of scientists give information according to which the Amazon River is longer. But this problem is still discussed, and this fact was only confirmed by the images made by satellites.

Almost every country has its main river that usually crosses the country. Rivers usually flow from north to south and have a great number of tributaries and confluents. In such way rivers form a wide system.

Every river has its source – the place where the river begins and its mouth – the pond into which the river falls. It is usually a sea or a lake or other rivers.

The waters of rivers are sweet waters, so theoretically it is possible to drink its water, but as it was mentioned before, rivers are polluted nowadays. The flora and fauna of rivers are very rich and people eat a great number of kinds of fishes that live in rivers. Besides, crayfishes also live in rivers.

Rivers are very important because with their help people have the possibility to sprinkle crops and plants, in such way they receive good harvest. Transporting abilities of rivers are very important as people use them to carry cargo from one part of the country to another and from one country to other. In such way people may distribute goods they produce.

People build dams and dikes to use the water of rivers. They use its water to wash and to drink, to sprinkle plants and to throw out poisoned substances and contamination.

But rivers should be carefully kept; people shouldn't allow rivers to dry out, as people will loose water-falls and beautiful landscapes.