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.
Answer:
Your answer will be (a) polder.
Oxidation - the breakdown of rock by oxygen and water, often giving iron-rich rocks a rusty-coloured weathered surface.
