It is one of the most recycled materials in the world.
Approximately 60% of steel is recycled. However, because more steel is produced than is recycled, only about 40% of steel produced comes from recycling.
The Three Gorges Dam causes a delay in the rotation of Earth.
The momentum is lost due to an enormous amount of water being forced through the dam. According to NASA estimates, the dam delays the rotation by 0,06 microseconds.