FACTBOX: Factories shut for blue sky for Beijing Olympics

(Reuters) - With less than a month to go to the Olympics, Beijing and neighboring provinces have asked polluting industries to shut or reduce production to clean the air for athletes, and to help offset a looming power shortage.

Polluters have been asked to shut or reduce production for two months beginning July 20.

Provinces across China anticipate electricity shortages this summer, as coal supplies tighten.

Rising power and other costs, combined with weaker-than-expected metals demand, have led some aluminum and small zinc smelters to announce voluntary output cuts of up to 10 percent from their expected production.

Below is a list of shutdowns due to take effect from July 20 unless otherwise stated:

BEIJING:

Shougang Steel Group, long Beijing's worst polluter, is relocating most operations to neighboring Hebei Province. It will reduce steel output at its Beijing plant in the third quarter to 560,000 tons, down 50 percent from a year earlier.

All cement producers in Beijing will be shut, as well as over 200 quarries and lime producers.

Beijing Eastern Chemical Works will shut down.

Beijing Yanshan Petrochemical Group, four coal-fired power plants and 18 other heavy polluters will cut production to reduce emissions by 30 percent.

HEBEI:

The province has shut down plants that could not meet environment protection requirements ahead of the Games. As of July 7, the following annual capacity was shut:

Coke: 350,000 tons

Iron: 7.11 million tons

Steel: 5.58 million tons

Cement: 9.67 million tons