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A long pipe in the centre of the tower penetrates the ocean bed until it reaches the layer that...
The Global Positioning System consists of 24 satellites but only 4 have to be visible for...
Raw iron is produced from iron ore in iron smelters.
Pollution is the negative effect of human activity on the natural environment.
This animation presents animals commonly kept as livestock and the primal cuts of their meat.
During those few thousand years, many kinds of people settled in Europe. Their way of life was...
The products of oil refining include diesel oil, petrol and lubricants.
Solar power stations convert solar energy into electricity.