Why did china believe the building of the three gorges dam was an absolute necessity in terms of energy production?

China believes that building the Three Gorges Dam was an absolute necessity in terms of energy production because it can generate hydro-electric energy from Yangtze River. This hydro-electric-producing dam would generate less pollution than coal-fire generation and would slow the river from overflowing and destroying nearby villages.

Answerhaiti, zambia;