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Pollution is the detrimental effect of human activity on the natural environment.
The desalination process produces drinking water from seawater.
The main sources of water pollution are industry, agriculture and urban areas.
A metropolis is a large city with a population of over 1 million people.
The double-decked, wide-bodied passenger aircraft can carry more then 500 passengers.
Machines converting the energy of flowing or falling water into useful forms of power were already in use in the Middle Ages.
Nuclear fusion will serve as an environmentally friendly and practically unlimited source of energy.
Aluminium smelting is the process of extracting aluminium from alumina by electrolysis.
This animations demonstrates the exterior and interior construction of cars, as well as their operation.
Nuclear power plants convert the energy released during nuclear fission into electric power.
The Panama Canal is an artificial waterway created to shorten shipping routes between the Pacific Ocean and the Atlantic Ocean.
We can travel on dual carriageways on the motorway.
The New Horizons space probe was launched in 2006, with the objective to study Pluto and the Kuiper Belt.
Space probes and Mars rovers examine the structure of Mars and possible traces of life.
At the end of the 18th century, mining boomed because of the great need for raw materials in the dynamically developing industry.
Neil Armstrong, one of the crew members of Apollo 11 was the first man to set foot on the Moon.
Deforestation has a negative impact on the environment.
The train operates between Paris and southern Germany, its cruise speed is 320 km/h.
Commercial maritime routes of container ships form a global network.
River locks make rivers with great level differences safe for boating.