[Graybeard58]

One damn big dam.

Three Gorges Dam:

The project used 27.2 million cubic metres (35.6×106 cu yd) of concrete (mainly for the dam wall), 463,000 tonnes of steel (enough to build 63 Eiffel Towers) and moved about 102.6 million cubic metres (134.2×106 cu yd) of earth.[28] The concrete dam wall is 181 metres (594 ft) high above the rock basis.

[grey_whiskers]

Someone need to point this out to Jeb.

I mean, read it for yourself:

The project used 27.2 million cubic metres (35.6×106 cu yd) of concrete (mainly for the dam wall),

See? Even CHINA built "the dam wall" /ba-dum t'sssssh>

[ThunderSleeps]

The volume of concrete in the Three Gorges would build just under 11 copies of the Hoover dam. (10.9 or so) That’s a lot of concrete...