Around the world, engineers and entrepreneurs are building larger and larger electrical grids. They are taking advantage of opportunities for profitable investment provided by improved technology.

Some of these grids connect different parts of large countries, like China. Others, including many in Europe, are connecting electrical systems in smaller countries to each other.

These projects all make economic sense in themselves or they would not be happening. The value of electricity is different in different locations and at different times. Larger grids allow moving electricity from where it is currently worth less to where it is worth more.

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