Construction waste a growing problem for China

Sunday's landslide revealed the threat posed by illegal dumping and a lack of related regulation, report Xu Wei in Beijing, Zhou Mo in Shenzhen, Guangdong province, and Zhou Wenting in Shanghai.

On Thursday evening, as hundreds of excavators and members of search and rescue teams continued to comb tons of red mud that swamped three industrial parks, including 33 buildings, in Shenzhen, Guangdong province.

As the work continued experts were asking how the unstable subsoil and construction debris could have been piled so high that it posed a threat to public safety.