Stretch of China’s Yellow River turns red

A stretch of China's Yellow River, the country's second longest, has turned red with pollution, state media reported on Monday.
Nearly a kilometre of the river, known as China’s mother river, had turned red near a park in downtown Lanzhou, capital of the northwestern province of Gansu, Xinhua news agency said.

The change of colour could have been caused by water from central heating systems, a local environmental protection official was quoted as saying.

"Test results will determine what the red discharge is and whether it is detrimental to the river’s ecology," Xinhua said.