However, they are still widely used in areas without electric lighting. The cost and danger of kerosene lighting are an ongoing problems in many countries.
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.
China is the world's largest producer of steel. The country accounts for 57% of the world's production.
The European Union is the second largest producer and India is the third largest producer. Other major global steel producers are: Japan, USA, Russia, South Korea and Turkey.
