Acid rain falls over 30 per cent of the country and the air in many cities will be virtually unbreathable by 2010 if carbon, sulphur dioxide and nitrogen oxide emissions continue rising at their current rate...In China's 11 biggest cities 50,000 people die prematurely and 400,000 people are infected by chronic bronchitis each year..."On the one hand China is the workshop of the world. On the other it is becoming the rubbish tip of the world," says one Chinese environmentalist...environmental laws need to be enforced...