Population pyramid

The population pyramid is a representation of the age and gender composition of a given country.

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Tourism is a significant sector of the economy that grows continuously all around the world.

Hovercraft, mark III SR N4

Hovercrafts are capable of travelling at high speed above the surface of water.

Intercontinental urban traffic

Transport planning that involves two distinct parts of a major city is no mean feat. Especially...

Water pollution

The main sources of water pollution are industry, agriculture and urban areas.


Ports must provide necessary infrastructure and services for industry and marine transport.

The United Nations

The largest international organization of the world; it includes every country of the Earth. Its...

Tidal power station

Tidal power stations utilise the daily fluctuation of the water level for producing electricity.

Soil pollution

This animation demonstrates the main sources of soil pollution.

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