China needs to improve law enforcement and make polluters pay to treat billions of tonnes of rural, industrial and household waste, the country’s top legislator said in a report to parliament late on Wednesday. Zhang Dejiang, chairman of the National People’s Congress, said China generates nearly four billion tonnes of waste a year from livestock and poultry as well as 200 million tonnes of household waste in large and medium-sized cities. China also produces 3.3 billion tonnes of industrial waste every year, including tailings from mines, with the accumulated volume now amounting to 60 billion to 70 billion tonnes nationwide, he said. China is expected to require as much as 10 trillion yuan (US$1.5 trillion) in investment in environmental infrastructure over the 2016 to 2020 period and will spend nearly 60 billion yuan on upgrading and extending sewage systems, according to the South China Morning Post. Domestic and overseas firms have been positioning themselves to take part.