In the case of the natural water cycle, the sun’s energy promotes water evaporation from natural resources, such as rivers, lakes, seas and plants. The evaporated water forms clouds, which send the energy back to the Earth’s surface in the form of rain. This rain then forms streams, rivers, lakes and seas. The natural cycle is completed.
Traditional means of transport deploy the energy of hydrocarbons – that took millions of years to form and which are
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