Construction of China's largest waste recycling project, the National Demonstration Eco-Industrial Park and South China Environmental Protection Industry Park, is underway on a site 25km outside Guangzhou, Guangdong province and is expected to be completed in three to five years. The US$3bn project, which is backed by the State Environmental Protection Agency, is intended to provide a home for a variety of green industries from consultancies to waste recycling. The site's developers say that more than 56 firms, some of them from overseas, have decided to invest in the project.