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Satellite navigation, GPS

The Global Positioning System consists of 24 satellites but only 4 have to be visible for positioning.

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Biogas power plant

Biogas can be produced from organic material (manure, plant waste, organic waste) using...

Meteorological instruments (basic)

This animation demonstrates instruments used to examine atmospheric phenomena.

Satellite types

Satellites orbiting the Earth can be used for civilian or military purposes.

Electricity supply network

The purpose of the electricity supply network is to provide electricity for consumers.

The population of the Earth in 2150

We are witnessing a rapid increase in the world’s population. It will reach 8 billion within...

Life on the farm (Hungary)

Farming consists of special agricultural activities.

Water pollution

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

Development of automobiles

Automobiles have evolved a lot since the late 19th century.

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