What did the construction of the hydroelectric power plant at Niagara Falls ultimately cement?

Answer

AC as the global standard for large-scale power transmission.

The successful design and operation of the first major hydroelectric plant at Niagara Falls, utilizing Tesla's AC system, confirmed AC's viability for massive, long-distance power delivery, solidifying its status as the global standard.

What did the construction of the hydroelectric power plant at Niagara Falls ultimately cement?
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