Almost every building in the game requires electricity to operate properly. For example, it is spent on industrial and some other buildings.
Electricity icon is marked with a yellow lightning and locates in the upper right corner of the game. Its level depends on the number of such special constructions as turbine, solar panel, generator and other. When your available power runs low, you can increase its level by buildings more of these objects. You can find them in the Electricity tab of the game Store. As you progress through the levels, more and more types of powerful generators will be unlocked.
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