ARE people aware that the world’s most populated city, Shanghai in China with a population of 23 million people, has a major water pollution problem caused by the dumping of some 15,000 dead pigs which have been found to be infected with porcine cirovirus?

It is thought that the pigs were dumped upstream in the Huangpu River which supplies about a quarter of Shanghai’s drinking water.

All dead livestock is supposed to be incinerated but dumping the bodies into the river is the easy option.

The Huangpu River is already very badly polluted and the last thing it needs is vast quantities of rotting carcasses. Twenty per cent of China’s rivers are so polluted that no one should even go near them.

China must be the most ungreen country in the world, and things can only get worse.

Malcolm Rolling, Durham.